सूचना पर आधारित कहानी लेखन लिखिए:(5)
जहां चाह होती है वहां राह निकल आती है इस सुविचार पर आधारित 80 शब्दों तक कहानी लेखन कीजिए!
नंबर 2:
यातायात की समस्या एवं उपाय विषय पर निबंध लिखिए(5)
Tuesday, March 30, 2021
Std: 8 Final Assessment Sub: Hindi Assessment 3
निम्नलिखित पत्र का प्रारूप तैयार कीजिए :(10)
स्वास्थ्य अधिकारी नगर पालिका अकोला को दूषित पानी की आपूर्ति होने के बारे में ध्यान आकर्षित करते हुए पत्र लिखता या लिखती है!
Std: 8 Final Assessment Sub: Hindi Assessment 2
कहानी लेखन मुद्दों के आधार पर कहानी पूरी कीजिए और एक सही स्पर्श दीजिए :
अकाल, पानी की समस्या ,जन सहायता, परिणाम(10)
Std: 7 Final Assessment Sub: Hindi Assessment 4
प्रश्न नं (1 ) यदि आप सैनिक होते तो क्या करते ।इस विषय पर अपने विचार लिखिए ( 5 )
प्रश्न नं ( 2 ) लालच का परिणाम इस विषय एक कहानी लिखिए ।(5 )
Std: 7 Final Assessment Sub: Hindi Assessment 3
7th enfant ka (3 ) Assignment paper.
प्रश्न (1 ) पत्थर हटाने का इनाम इस विषय पर एक कहानी लिखिए ।( 5 )
प्रश्न नं ( 2 ) मित्र के जन्म दिन पर उसे बधाई देते हुए उसे बधाई पत्र लिखें । ( 5 )
Std: 7 Final Assessment Sub: Hindi Assessment 2
7th enfant ka (2 )Assignment paper.
प्रश्न नं (1 ) एक पेड़ की आत्मकथा पर निबंध लिखिए ।( 5 )
प्रश्न नं ( 2 ) बेटी पर्व और शिक्षामय विश्व पर अपने विचार लिखिए । ( 5 )
Std: 7 Final Assessment Sub: Hindi Assessment 1
7th enfant Ka( 1 ) Assignment paper.
प्रश्न नं (1 ) यदि आप का घर मंगल ग्रह पर हो तो आप क्या करेंगे।इस पर अपने विचार लिखिए ।(5 )
प्रश्न नं (2 ) प्रदूषण इस विषय पर निबंध लिखिए ।(5 )
Std: 6 Final Assessment Sub: Hindi Assessment 4
6th enfant ka (4 )Assignment paper.
प्रश्न नं ( 1 ) यदि खनिज तेल का खजाना समाप्त हो जाए तो क्या होगा ।इस विषय पर अपने विचार लिखिए ।( 5 )
प्रश्न नं (2 ) यदि हिमालय की बर्फ पिघलना बंद हो जाए तो क्या होगा । इस पर अपने विचार लिखिए ।( 5 )
Std: 6 Final Assessment Sub: Hindi Assessment 3
6th enfant ka (3 )Assignment paper.
प्रश्न नं ( 1 ) पेड़ की आत्मकथा पर निबंध लिखिए ।( 5 ) प्रश्न नं (2 ) स्वार्थी मित्र पर एक कहानी लिखिए ।( 5 )
Std: 6 Final Assessment Sub: Hindi Assessment 2
6th enfant ka ( 2 ) Assignment paper.
प्रश्न नं ( 1 ) एक फूल की आत्मकथा पर निबंध लिखिए ।( 5 )
प्रश्न (2 ) लालच का परिणाम इस विषय पर एक कहानी लिखिए ।( 5 )
Std: 6 Final Assessment Sub: Hindi Assessment 1
प्रश्न नं (1 ) निम्नलिखित शब्द पर निबंध लिखिए ।
पेड़ हमारे मित्र । ( 5 )
प्रश्न नं ( 2 )
पत्थर हटाने का इनाम ।इस शब्द पर कहानी लिखिए । ( 5 )
Std Jr kg Final Assessment Conversation
My self. (10)
I am a ______.
My name is ________.
I am ________ years old.
I study in std ______.
I live in ________.
Std Sr kg Final Assessment Conversation
My School. (10)
My school name is __________.
I study in _________ class in my school.
My school classroom are _________ and _______.
There are more than ________ students in my school.
My principal name is __________.
My class teacher name is _______.
My family. (10)
My name is ___________.
I am ________ years old.
My mother name is _______.
My father name is ______.
My grandmother name is ________.
My grandfather name is _______.
My sister name is _______.
I ______ my family very much.
Monday, March 29, 2021
Std:6 Final Assessment Sub:SST Assessment 1
Q:1: who I am. (4m).
1) I connect places of equal temperature.
2) I am useful for measuring the correct temperature.
3) I get heated due to the land or water near me.
4) Land and water get heated due to me.
Q:2: answers the following. (6m) .
A) Explain with a diagram, the effect of the spherical shape of the earth on the temperature at different latitudes.
B) What is the relation between the latitudinal extent and temperature of a region?
C) what makes the isotherms run zigzag over continental areas?
Std:8 Final Assessment Sub:SST Assessment 4
8th. Assessment 4. (10m).
1: diagram showing the structure of the earth interior.
2: types of clouds.
Std:8 Final Assessment Sub:SST Assessment 3
8th assessment 3. (10m).
A: what are the consideration of the chief minister while allocation of portfolios ? (4m).
B: types of civil services ? (4m).
C: make a chat of union government. (2m).
Std:8 Final Assessment Sub:SST Assessment 2
Explain the following statement with reasons. (6m)
(1).the indian National congress approved the partition.
(2).The working of interim government could
Not rum smoothly.
(3).the wavell plan could not become successful.
Q3.write short notes (any two) (4m)
(1).Simon commission
(2).Quit Indian Movement
(3).Cripps mission
Std:8 Final Assessment Sub:SST Assessment 1
Q:1: Explain the effect of. (Any 5). (10m).
a) Warm ocean currents on climate.
b) Cold ocean currents on the movement of iceberg.
c) The shape of the coast line on ocean currents.
d) Meeting of warm and cold ocean currents.
e) The transportational capacity of ocean currents.
f) Deep ocean currents.
Std:7 Final Assessment Sub:SST Assessment 1
Q:1: Explain the effect of. (Any 5). (10m).
a) Warm ocean currents on climate.
b) Cold ocean currents on the movement of iceberg.
c) The shape of the coast line on ocean currents.
d) Meeting of warm and cold ocean currents.
e) The transportational capacity of ocean currents.
f) Deep ocean currents.
Std:7 Final Assessment Sub:SST Assessment 4
7th. Assessment 4. 10 marks.
Q:1: write in brief. (10m).
1. The family tree of the bhonsales.
2. The family tree of a pashwas.
Std:7 Final Assessment Sub:SST Assessment 3
7 th. Assessment 3 (10m).
Q:1: draw the diagram. (10m).
(a) change in direction of winds.
(b) draw a diagram showing the cycle of season in the southern hemisphere.
Std:7 Final Assessment Sub:SST Assessment 2
write in short. any two. (4m).
1) Oral sources.
2) Written sources.
3) Sultanate in the north.
Civics. any one. (2m).
Provisions of the constitution.
Constitution day.
Geography.
Write any two. (4m).
1) solar Eclipse.
2) Lunar Eclipse.
3) Draw the daigram. ( angle made by the earth-moon-sun)
Std:6 Final Assessment Sub:SST Assessment 4
6th. SST. Assessment 4.
Q:1: write in brief. (10m).
1. What factors influence the formation of soil ?
2. What are the uses of minerals ?.
Std:6 Final Assessment Sub:SST Assessment 3
10 m). SST . Assessment 3rd.
Q:2: Answers in one sentence (5m)
What is meant by janapada ?
What is meant by mahajanapada ?
Where was the first Buddhist council held ?
Who did Ashoka send to Sri Lanka for the spread of Buddhism ?
Why did the satraps being to fight among themselves ?
Q:3: can you tell. (5m).
1) The kings who started the minting of gold coins in india.
2) The city established by Kanishka in Kashmir.
3) The king who played the veena ?
4) Another name for Kamrup ?
5) The ancient name of Kolhapur ?
Satrap.
Sudarshan.
Std 5 Final Assessment Maths Assessment 7
Assessment:7
Q.1) Answer the following questions.
1) Using brackets, write three pairs of numbers whose sum is 13. Use them to
Write three equalities. (4)
2) Draw three pictures of each of these three
dimensional objects - a table , a chair and
a water - bottle as viewed from the front ,
from a side and from above . (4)
3) The length of the side of each Square is
given below. Find it's area. (2)
(1) 12 metres (2) 6cm (3) 25 metres (4) 18cm
Q.2) 1) if the cost of 1 sq m of a plot of land
Is 900 rupees,find the total cost of a plot of
land that is 25m long and 20 m broad. (4)
2) The numbers of the various books kept
In a cupboard in the school library are given
below. Make a pictograph showing the
Information given. (4)
Type of book : Number
Science : 28
Sports : 14
Poetry : 21
Literature : 35
History : 7
3) Make a pictographs for the following. (2)
Profession : Number
Doctors : 49
Engineers : 7
Teachers : 14
Professors : 84
Q.3 ) Do multiplication. (4)
(1) 24358 x 8924
(2) 4326 x 3236
2) find four pairs of numbers, one for each of
Addition , subtraction , multiplication and
division that make the number 18. Write
the equalities for each of them . (4)
3) Fill in the blanks with the right symbol
From <,> or =. (2)
1) (45÷9) □ (9-4)
2) (6+1) □ (3×2)
Q.4) Say whether right or wrong. (5)
1) (23+4) = (4+ 23)
2) (9+4) > 12
3) 138 > 138
4) (16 + 0) = 16
5) (9 + 4) = 12
2) Stocks of various types of grains stored
In a warehouse are as given below. Make
a pictograph based on the information
given . (5)
Std:6 Final Assessment Sub:SST Assessment 2
Q:1: write short notes. any two.(4m).
1) what does human life depend on.
2) Material sources.
3) Which region is known as the Indian subcontinent.
Civics.
Write any one . (2m).
a) What is society.
b) Why is the necessary to setup a permanent system in society.
Geography
any two. (4m).
1) The graticule.
2) Parallels of latitude.
3) Greenwich meridian.
Std 5 Final Assessment Maths Assessment 5
Assessment:5
Q.1) Answer the following questions.
1) Find the square numbers from the list
given below. (3)
2) Which are the triangular numbers in the
given list . (3)
3) if 4 is the first Square number, which is the
tenth one? (2)
4) Name a number which is Square as well as triangular? (2)
Std:7 Final Assessment Sub:SST Assessment 1
Q:1: fill in the blanks. (4m).
1) At higher altitudes air becomes _____________.
2) Air pressure is expressed in__________.
3) On the earth air pressure is ______________.
4) The _____________ pressure belt spreads between 5 degree north and 5 degree south parallel.
Q:2: Give short answer. (6m).
1) what effect does temperature have on air pressure?
2) Why is the subpolar low pressure belt formed?
3) Horizontal distribution of air pressure?
Std 5 Final Assessment Maths Assessment 4
Assessment:4
Q.1) Answer the following questions.
1) The side of a Square is 4cm.the length of
a rectangle is 8cm and it's width is 2cm.find the perimeter and area of both figures? (4)
2) What will be the Labour cost of laying the
Floor of an assembly hall that is 16m long and
12m wide if the cost of laying 1 Sq m is 80
rupees? (3)
3) Sanju completes 12 rounds around a Square park everyday . If one side of the park
Is 120 m ,find out in kilometres and meters the distance that sanju covers daily ? (3)
Std 5 Final Assessment Maths Assessment 3
Assessment:3
Q.1) Answer the following questions.
1) How much wire will be needed to make
a rectangular 7cm long and 4cm wide ? (4)
2) if the length of a rectangle is 20m and it's width is 12m, what is it's perimeter? (3)
3) Each side of a Square is 9m long.find it's
Perimeter? (3)
Std 5 Final Assessment Maths Assessment 2
Assessment:2
Q.1) Answer the following questions. (4)
1) The length of a rectangular plot of land is
50m and it's width is 30 m . A triple fence has
to be put along its edges. If the wire costs 60
rupees per meter , what will be the total cost of the wire needed for the fence ?
2) A game requires its players to run around a
Square playground . Each side of the playground is 20 m long.one player took 5 rounds around the playground. How many
meters did he run altogether? (3)
3) Four rounds of wire fence have to be put
around a field.if the field is 60m long and 40m
Wide ,how much wire will be needed? (3)
Std 4 Final Assessment Marathi Assessment 7
ASSESSMENT 7
प्रश्न १ रिकाम्या जागी कंसातील योग्य पर्याय लिहा: (०४)
१) झुगी _______________ वर्षाची मुलगी होती.
२) सायंकाळी झुगी______________ करती होती.
३) झुगीची आई ___________ पाणी आणियाला गेली होती.
४) ______________ झुगीच्या डोक्यावरून हात फिरवला.
प्रश्न २ कोणते लिहा:. (०४)
१) पिसारा असणारा __________________________
२) गाण्यात दंगा _____________________________
३) खुप मित्रा _______________________________
४) मनात विचारांचा गुंता असणारा ________________
प्रश्न ३ कवितेच्या ओळी पूर्ण करा : ०५
चिमणी__________________________________
________________________________पिसारा.
वाघोबाचा_________________________________
___________________________________कुत्रा.
जो तो____________________________________
_____________________________________चिंता.
प्रश्न ४ प्रत्येकी एक या शब्दात उत्तर लिहा: ०४
१) तापाने फणफणणारी - _____________________
२) आईच्या कपाळावर रुमालच्या घड्या ठेवणारा __________________________
३) आईला च्या करून देणारा _______________
४) आईला तपासणारे ______________________
प्रश्न ५ पुढील बरोबर वाक्यांसमोर √ करा. चुकीच्या वाक्यांसमोर × करा: ०५
१) झाडाला पाणी घाला.___________
२) झाडाची पाने तोडा.____________
३) झाड फळे देते .___________
४) झाडावर फुले फुलत नाहीत.___________
५) नवी झाडे लावू नका.____________
प्रश्न ६ शब्दार्थ .इन इंग्लिश. ०४
१) आई ____________
२) औषध ___________
३ ताप______________
४) शाळा ______________
प्रश्न ७ विरुद्धार्थी शब्द लिहा . ०४
चूक ×
देश ×
बसणे ×
सुंदर x
Std 4 Final Assessment Marathi Assessment 5
ASSESSMENT 5
प्रश्न १ शब्दार्थ. (इन इंग्लिश). ,(०६)
१) अनुभव -
२) शाळा सुटली -
३) इकडे तिकडे -
४) बरं ना वाटणे -
५) समाधान -
६) आराम करणे. -
प्रश्न २ रिकाम्या जागा भरा. (०४)
१) झुगी ______________वर्षाची मुलगी.
२) सायंकाळी झुगी _______________करते होती.
३) आईने ____________ भात शिजायला ठेवला.
४) सगळ्यांनी झुगीचे ____________ केले.
Std 4 Final Assessment Marathi Assessment 4
ASSESSMENT 4
प्रश्न १ शब्दार्थ : (In English)
१) धाडसी -
२) शेत -
३) घाबरणे. -
४) विचार करणे -
५) झटकन -
६) जीव वाचला -
७) प्रसंग -
८) बातमी पसरणे -
९) गाव -
१०) पाठ थोपटली -
११) प्रशन -
१२) माणूस -
१३) कोकीळ -
१४) शूर -
१५) आनंद -
Std 4 Final Assessment Marathi Assessment 3
ASSESSMENT 3
प्रश्न १ खलील शब्दांच्या शेवटी ' णार ' लिहा व शब्द वाचा. (०७)
१) कार -
२) झोप -
३) भर -
४) काढ -
५) बघ -
६) घाल -
७) विचार -
८) जोड -
प्रश्न २ रिकाम्या जागी योग्य शब्द भरा. (०३)
१) __________ गणित त्यावर करणार.
२) सुबक सुंदर काढणार ____________
३) देश विदेश जोडणार________________
९) ठेव -
Std 4 Final Assessment Marathi Assessment 2
ASSESSMENT 2
प्रश्न१ विरुद्धार्थी शब्द लिहा. (०५)
१) धाडसी ×
२) आत ×
३) वर ×
४) सकाळ ×
५) जवळ ×
प्रश्न २ समानार्थी शब्द लिहा. (०५)
१) कौतुक -
२) शेत -
३) धाडसी -
४) बक्षीस -
५) आई -
Saturday, March 27, 2021
Class 7 Science 20 – In the World of Stars Questionnaire with Answers
20 – In the World of Stars
Q 1.
Fill in the blanks with appropriate word given in brackets :
(1)
When seen from a great distance, the sky seems to be touching the ground along
a
circle.
This circle is called the ………………..
(2)
The ......................... is used while defining the zodiac signs.
(3)
Classified according to seasons, one season will have…………….. nakshatras.
(4)
The rising of the sun in the east and its setting in the west is the………….... motion of the sun
Ans. (1) horizon (2) ecliptic (3) nine (4)
apparent
Q. 2.
Answer the following:
(1) A
star rises at 8 pm tonight, at what time will it rise after a month? Why?
Ans.
The stars rise 4 minutes early every next day. Therefore, after a month it will
be 120 minutes or 2 hours earlier than tonight. Thus, the star will rise at 6
pm after a month.
(2)
What is meant by 'the sun enters nakshatra'? It is said that in rainy season
sun enters Mrug nakshatra. What does it mean?
Ans.
As the earth changes its position due to its revolution, a different
constellation or raashi appears behind the sun every 13° 20'. But this is
expressed as if sun has entered a particular raashi. So, when we say sun has
entered Mrug nakshatra, actually Mrug constellation is behind the sun.
(3)
What is a constellation?
Ans. A
group of stars occupying a small portion of celestial sphere is called a
constellation. Some of these stars appear to form certain animal or human
figures and objects. These constellations are known by the brightest star
present in it.
(4)
Write a paragraph on birth and lifecycle of a star using figure on page 201.
Ans.
The stars are born out of nebulae which are the clouds of hydrogen gas and dust
particles. In the nebulae there are particles that are attracted towards one
another due to the force of gravity. This makes contractions in the clouds
resulting into denser and spherical bodies. At the same time, at the core of
clouds the pressure of the gas increases. This causes rise in the temperature
to tremendous extent. The energy is generated due to this condition. This
spherical cloud of hydrogen is called a 'star'.
The
processes such as contraction, expansion, rise in temperature, etc. bring about
changes in the nature of the star eventually. These changes are very gradual
and spread over a very long period of time. They constitute the lifecycle of
stars. Astronomers identify these different forms of the stars at various
stages during their lifecycle. They are then named with some identity.
(5) Is it wrong to say that planets, stars and
nakshatras affect human life? why?
Ans.
Distant stars, planets, comets or any constellation do not have any influence
on human life. In the age of scientific and technological progress, man has
stepped over the moon. Soon in this century man will step on the Mars too.
Therefore, unless it is scientifically proved, we cannot say that stars,
planets and celestial bodies have impact on human life.
Class 7 Science 19 - Properties of Magnetic field Questionnaire with Answers
19 - Properties of
Magnetic field
Q 1. Fill in the blanks with the appropriate words:
(1)
The alloys called…………and……… are used for making industrial magnets.
(2) A
magnetic field can pass through …………. and ………………..
(3)
The intensity of a magnetic field is indicated by the lines of …………….
(4)
The real test of a magnet is .....................
Ans.
(1) Nipermag and alnico (2) cardboard and water (3) force (4) repulsion
Q. 2.
With whom should I pair up?
Ans.
(1)
Compass - A magnetic needle
(2)
Door of a cupboard - A magnet
3)
Repulsion - Like poles
(4)
Magnetic pole - The highest magnetic
force.
Q. 3.
Answer the following questions:
(1) Distinguish between the two methods of making an
artificial man
Ans.
Single-touch method Double-touch method
2. 'N pole of one bar magnet is rubbed over 2. Taking two bar magnets and placing
a
steel bar from the end A to the end B. their two opposite poles at the centre
of On repeating this procedure 15-20 again the
steel bar, both the magnets are rubbed and again magnetism is developed in the over the steel bar from one end to the
steel
bar. This method is called the other such as south pole of one
of magnet single-touch method. is at the 'A' end and the north pole
of the
another bar magnet is at the 'B' end. On
repeating
this procedure 15 to 20 times
again and again, magnetism is developed in
the
steel bar. This method is
called the double-touch method.
3. The
magnetism produced by this method 3. The
magnetism produced by this method
is of
low strength and lasts for a short
lasts longer as compared to that
of single
while. touch method.
(2) Which
substances are used for making electromagnets?
Ans.
Electromagnet is made using - an iron nail, copper wire of about 1 meter, a
battery and pins and can be tested.
(3)
Write a note on 'magnetic field'.
Ans. Michael Faradey proposed the idea of magnetic
lines of force to explain the magnetic field. The magnetism of a magnet acts
upon a certain distance from the magnet. The
space around the magnet in which the magnetic force acts on an object, is
called a magnetic field. The magnetic field around the magnet can be shown with
magnetic lines of force.
(4)
Why is a magnetic needle used in a compass?
Ans.
The magnetic needle used in a compass freely rotates and always settles in the north-south
direction as it is a property of a magnet. Thus, a magnetic needle can be used
to ascertain the direction.
Hence, magnetic needle is used in a compass.
(5) Explain with the help of a diagram how the
intensity and direction of the magnetic field of a bar magnet can be
determined.
Ans.
(1) The intensity of magnetic field is indicated by the magnetic lines of force
in that particular area. (2) Intensity of magnetic field in a particular area
can be understood by the number of field lines passing perpendicular through
that! unit area. The intensity of magnetic field is more where the lines of
force are more concentrated. (3) The direction of magnetic field is determined
by the directions of magnetic lines of force. The magnetic lines of force
always start from Magnetic field the north pole and end on the south pole. In
the similar manner, the direction of magnetic field is from north pole to south
pole.
(6) Give detailed information about how the merchants of olden times used a magnet while travelling.
Ans.
The merchants of olden times used to carry compass for ascertaining directions
while travelling. In a compass, a magnetic needle is fitted. This magnetic
needle supported on a sharp point can freely rotate in horizontal plane. If a
traveller goes anywhere while travelling, due to the property of a magnet,
magnetic needle always get settled in the north South direction. Once, the
north direction is known, other directions can be easily known. At the oceans
where only water is seen everywhere or at the desert areas where only sand is
seen everywhere, it becomes difficult to know the direction at night. At that
time, the compass to be helpful for merchants to know the directions.
Class 7 Science 18 – Sound – Production of Sound Questionnaire with Answers
18 – Sound – Production of Sound
Q. 1. Fill in the blanks with appropriate words and complete the sentence:
(1) Sound is generated by the rhythmic .....................
of any object.
(2) The frequency of sound is measured in
.................
(3) If ................. of sound is decreased, its
loudness also decreases.
(4) A medium is necessary for .....................
of sound
Ans.
(1) vibrations (2) Hertz (3) amplitude (4) propagation
Q. 2.
Match the columns :
Answer
(1)
Flute - Vibrations in the air
(2)
Frequency - Measured in Hz
(3)
Sound level - Decibel
(4)
Ultrasonic sound - Frequency more than
20000 Hz
(5)
Infrasonic sound - Frequency less than 20 Hz
Q. 3.
Answer the following questions :
(1)
How is sound produced?
Ans.
Vibrations are produced in an object when it is struck. Vibrating object is a
source of sound. The rhythmic vibrations of an object produces sound.
(2)
What does the intensity of sound depend upon?
Ans.
The intensity of sound depends upon :
(1)
Amplitude of vibrations : The intensity of sound is proportional to the square
of the amplitude of vibration.
(2)
Frequency of fibrations : If frequency is higher then intensity of sound is
also higher.
(3)
Distance from the source of sound : If the distance between the listener and
the source of sound is less than intensity of sound can be felt greater.
(3)
Explain how the frequence of oscillation is related to the length of a pendulum
and the amplitude of its oscillation.
Ans.
(1) As the length of a pendulum increases, the frequency of oscillations
decreases That means, as the length of a pendulum increases, the number of
oscillations in one second decreases. (2) The frequency of oscillations is not
affected much by the amplitude of oscillations. That means, even if the
amplitude is increased, the frequency does not change much, it remains nearly
the same.
(4)
Explain the two ways by which the pitch of the sound generated by a stretched
string or wire can be changed.
Ans.
(1) When the tension in the wire is increased, the frequency increases and thus
the sound produced is shriller. Also, when the tension in the wire is
decreased, the frequency decreases and the sound produced is less shrill. (2)
When the length of the wire is decreased, the frequency increases. Thus, the
sound produced is shriller. When the length of the wire is increased, the
frequency decreases and the sound produced is less shrill. Using these two
ways, the pitch of the sound generated by a stretched wire can be changed.
Q. 4.
Give scientific reasons :
(1) In earlier times, people used to listen for the
arrival of a distant train putting their ear to the rail.
Ans. (1)
While the train runs on the rail, its wheels bang on the rail and friction
occurs (2) These banging and friction produce vibrations and sound is produced.
(3) These vibrarations propagate to a large distance through a solid medium
such as rail. That means, the sound travels over a large distance through rail.
(4) If ear is put to the rail this sound can be clearly heard and the arrival
of a train can be guessed. Thus, in earlier times, people used to listen for
the arrival of a distant train by putting their ear to the rail.
(2)
The sounds generated by a tabla and sitar are different.
Ans.
(1) The stretched diaphram of a tabla when strucked produces vibrations which generates
the sound. (2) The stretched string of a sitar when plucked produces vibrations
which generates the sound. (3) In this way, due to the difference in the
vibrating object, the frequency of vibrations from both the objects is
different, and the pitch of sound is also different. Thus, the sounds generated
by a tabla and a sitar is different.
(3) Your friend
will not be able to hear your call, if you were both on the moon.
Ans.
(1) Medium is necessary for the propagation of sound. (2) There is no
atmosphere on the moon as that of the earth and thus due to absence of medium
sound does not propagate while talking on the moon. This is the reason, why
your friend will not be able to hear your call.
(4) We
can hear the movement of a mosquito's wings but we cannot hear the movement of
our hands.
Ans.
(1) The up-down movement of a mosquito's wings occur very fast. In one second,
it's wings move about 300 to 600 times. That means, the frequency of movement
of the wings is 300 Hz to 600 Hz. Thus, audible sound is produced and the
movement of the wings can be heard. (2) On the other hand, we cannot move our
hands so rapidly. The frequency of sound produced by movement of hands is less
than 20 Hz. We cannot hear this infrasonic sound Thus, the movement of our
hands cannot be heard.
Std:6 Final Assessment Sub: Marathi Assessment 1
प क्र 1 पुढील शब्दाचे अर्थ लिहून शब्द जसे तशी लिहा 10 मार्क्स
1. कप - चहा पिणाच साधन
2. तार - धातूची बारीक लांब काडी
3.खरे - सत्य,
4. गर -गाभा,
5. घर -सदन,
6. चार -अंक,
7. पर -पंख,
8. वर -नवरा,
9. वार -दिवस,
10.गार -थंड
Std:6 Final Assessment Sub: Marathi Assessment 2
Assessment no -2 class 6th 10 marks
प (1) खालील शब्दाचे लिगं ओळखा व वचन बदला.
1. घर --- , ---,
2. भित ----,-----,
3. चेहरा -----,----,4. निवारा ----,-----,.5. आई -----,----, 6. हवा ----,----,7. आजोबा ----,------8. नारळ -----,------9. केळी -----,-----10. कुलूप ------,------.
Std:6 Final Assessment Sub: Marathi Assessment 3
Assessment no-3 class 6th 10 marks
प 1 खालील शब्दाचे अनेकवचन लिहा
1. छत्री --------,2. डोळा -------,3. पाटी -------,4. अंगटी ------,5. बांगडी --------,6. पुस्तक ------,7. खिडकी --------,8. दप्तर -------,9. चमचा --------,10. नारळ ------
Std:6 Final Assessment Sub: Marathi Assessment 4
Assessment no-4 class 6th 10 marks
प 1 खालील कविता पूर्ण करा.
एकविसाव्यl शतक भरेल -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------नावा लागले वरती.
Std:7 Final Assessment Sub: Marathi Assessment 1
Assessment no - 1 class 7th marks -10
प 1 कविते च्या पुढली ओळी पूर्ण करा 10
घरात होता, काना-मात्रा -वेलाटीचा मेळ ----------------------------------------------------------------------------------------------------------------------------------------------------------------राही गाणे काळजीभर सुंदर सुंदर शब्दlचे सुंदर सुंदर घर
Std:7 Final Assessment Sub: Marathi Assessment 2
Assessment no -2 class 7th marks 10 grammar
प 1 तक्ता पूर्ण करा पुलिगं सीर्लिग
1. पुरुष ---------,2. पुत्र ----------,3. विद्वान ----------,4. शिक्षक ----------,5. सासरा ------------,6. साधू --------------,7. राजा -----------,8. माकड -----------,9. चिमणा ------------,10. घोडा --------------
Std:7 Final Assessment Sub: Marathi Assessment 3
Assessment no -3 class -7th marks -10
प 1 पुढील शब्दाचे विरुद्ध शब्द लिहा
1. यश × ,
2. आवड ×
3. सोपे ×
4. सुरवात ×
5. आता ×
6. मैत्री ×
7. पुढे ×
8. दिवस ×
9. जाता ×
10. शुभ ×
Std:8 Final Assessment Sub: Marathi Assessment 1
Assessment no-1 class -8th marks -10
निबंधलेखण ( eassay writting ) (any one )
1.माझा आवडता प्राणी ,
2. माझा आवडता खेळ
Std:8 Final Assessment Sub: Marathi Assessment 2
Assessment no- 2 class -8th marks -10
प 1. आकृती पूर्ण करा.
अ )सानुला झुळूकेच्या इच्छा ------>
1.-----,2.-----,3.-----,4.------
आ )सानुला झुळकच्या प्रवासlचे स्वरूप
1.----,2.-----,3----,4.------
इ )सानूला झुळूकेची लोकोप योगी कामे --------
-1.--------2.-------3------
Std:8 Final Assessment Sub: Marathi Assessment 3
Assessment no-3 class -3 marks -10 प letter writting (पत्र लेखन )
1.तुमच्या शाळेमध्ये उन्हाळी सुट्टी त "हसताक्षर सुंदर करूया!" हे 10 दिवसाचे शिबीर आयोजीत केले आहे. त्यात तुम्ही ला सहभागी करून घेन्यllची विनंती पत्र वर्गशिक्षकl ना लिहा.
Std:8 Final Assessment Sub: Marathi Assessment 4
Assessment no-4 class -8th marks -10 प्र 1. अ )चौकट पूर्ण करा (Fill in the boxes) 10
1. येथे कष्टकऱ्हायlची वस्ती आहे --------------- 2. अभंग असलेले ---------------------- 3. लेखकाला मिळालेले पुरस्कार ---------------- 4. लेखकlचा आवडता खेळ --------------------- 5. ज्या गियlर्रोहन संथाकडून ईशानला ई -मेल आला ते ठीकण --------------- 6. ईशानच्या मित्रlची नावे ---------------------------------- 7.झुळूकेने थेट दिलेली नैसर्गिक ठिकाणे ---------------- 8. नदीचा रंग ------------------- 9. निरोप घेताना मांजराचा गजर --------------------- 10. मंजूळ गाने हिचे -----------------------
Friday, March 26, 2021
Class 7 Science 17 – Effects of Light Questionnaire with Answers
17 – Effects of Light
Q 1.
Fill in the blanks :
(1)
When the beams from the headlights of a car fall on an object in the night, the
shadows called…………... and............... can be seen.
(2)
During a lunar eclipse the shadow of the ..................... falls on the
............
(3)
During a solar eclipse the shadow of the………... falls on the ............
(4)
Various shades of colour are seen in the sky at sunrise and sunset due to
.............
Ans.(1) umbra, penumbra (2) earth, moon (3) moon, earth
(4) scattering of light
Q 2.
Explain the difference.
(1)
Point sources of light and extended
sources of light.
Ans.
Point sources of light Extended
sources of light
1. A
point source is tiny in size.
1. An extended source of light is bigger in
size.
2.The
umbra is obtained from this source of 2.
The umbra and penumbra are both
Light.
obtained from this source of light. Example : Light coming from a tiny
hole 3. Example : The sun, a torch
(2)
Umbra and penumbra.
Ans. Umbra
Penumbra
1. The
umbra is dark. 1. The
penumbra is faint.
2. The
umbra is obtained from a point 2.
The penumbra is obtained only from an
source
as well as an extended source of extended source of light.
light.
3. A
total eclipse takes place from the part 3. A partial eclipse takes place from the of of umbra.
part of penumbra.
Q. 6.
Answer the following questions in your own words:
(1) What is meant by scattering of light?
Ans.
The light rays hit the molecules, dust particles and other tiny particles
present in le atmosphere and get scattered. This phenomenon is called
scattering of light. When the scattered light rays enter our eyes, we perceive
the light. A beam of light, blue sky, reddish appearance of sun are all effects
of scattering of light.
(2)
Does the shadow really vanish in the zero shadow condition?
Ans.
On the zero shadow day, at noon, the sun reaches exactly over our head. Thus,
the shadow of our body in a standing position (without stretching hands and
legs) is formed right below the base of our feet. The shadow so formed is not
seen and hence appears to be vanished.
(3)
Will the laser beam be seen if it passes through a glass box which contains a
lighted incense stick?
Ans.
Scattering of light is required/necessary, for a ray of light to be visible.
For this, the light rays should get scattered on hitting the tiny particles in
its path. There are tiny particles of the incense stick scattered in the closed
glass box, due to which the laser rays get scattered. These scattered rays
enter our eyes and the laser beam is seen.
(4) Give
some examples of scattering of light that we come across in day-to-day life.
Ans.
(1) A beam of light emerging from a cinema projector on a screen. 2) A beam of
gnt emerging from head lamps of a car moving through a thick fog. (3) The sun
appears red at sunset. (4) The sky appears blue.
(5)
Why is the shadow of a bird flying high not seen on the earth?
Ans.
The sun is an extended source of light which is extremely bigger than the earth
When a bird flies (at relatively shorter height from the ground), there is a
formation of umbra and penumbra on the ground. But, as they fly high in the sky,
their umbra becomes smaller and smaller and eventually disappears. At the same
time, their penumbra becomes more and more fainter and then disappears. As a result, the shadow
of the bird flying high is not seen on
the earth.
(6)
Why is a penumbra not obtained from a point source?
Ans.
Scattering of light emerging from a point source does not take place. Thus,
only dark shadow of the object placed in front of the point source is obtained.
(7)
Various eclipses and the conditions during that period.
Ans.
(1) A solar eclipse : The moon comes between the sun and the earth in a
straight line. Thus, the shadow of the moon falls/casts on the earth. (See
figure on page 168.)
A
total solar eclipse - (i) It is visible from within the part of the earth where
the umbra of the moon falls. (ii) The solar disc is completely covered by the
moon. (iii) Darkness reads on the part of the earth where the shadow of the
moon falls.
A
partial solar eclipse - (i) It is visible from within the part of the earth
where the penumbra of the moon falls. (ii) The moon does not cover the solar
disc completely.
An
annular solar eclipse - (i) It is seen/visible from the part of the earth where
a very small portion of the umbra of the moon falls. (ii) It is seen that the
pat of solar disc,
except
the peripheral ring, is completely covered by the moon. (iii) The edge of solar
disc appears like an illuminated ring.
(2) A
lunar eclipse : The earth comes between the sun and the moon in a straight
line. Thus, the shadow of the earth falls/casts on the moon.
A
total lunar eclipse - At this event, the moon completely comes in the shadow of
the
une.
earth.
A
partial lunar eclipse - At this event, a part of the moon comes in the shadow
of the earth.
Q. 7.
Give scientific reasons :
(1)
Space beyond the earth's atmosphere appears dark.
Ans.
There is a vacuum beyond earth's atmosphere, due to which there is no medium
for scattering of sunlight. As a result, space appears dark.
(2) We
are able to read while sitting in the shade.
Ans.
The sun is an extended source of light which is far away from the earth. The
sunlight casts a shadow of the object, in its path, on the earth. This shadow
has no umbra but penumbra which is nothing but the shade. There is a sufficient
amount of light available to read in the shade. Hence, we are able to read while
sitting in the shade.
(3) We
should not observe the solar eclipse with naked eyes.
Ans.
The earth receives the harmful ultra-violet rays from the sun. During a solar
eclipse, even if brightness of the sun is less, the ultra-violet rays reach the
earth. If the solar eclipse is seen/watched with naked eyes, the ultra-violet
rays directly enter our eyes and damage vision. Hence, the solar eclipse should
not be observed with naked eyes.
(1)
Write a science based paragraph on What if the sun did not rise?
Ans.
If the earth stops revolving, the part of the earth opposite to the sun would
never face the sun. Thus, the sun would never rise at that part.
following
are its effects/consequences :
1.The part
of the earth opposite to the sun would not receive sunlight. That part would
always
experience darkness. Artificial sources of light would have to be used continuously.
For which, a large amount of electricity would need to be generated.
2.The
phenomena like solar eclipse, zero shadow, spectrum, various shades of colour
in the sky would not be seen.
3. Temperature
of that part of the earth would decrease extremely. Water present in the liquid
state on the earth would freeze completely. This would prove to be unfavorable
for the living world.
4.The
process of photosynthesis in the plants would not take place in the absence of sunlight.
This would adversely affect plant's growth. Animals that feed on plants would
become endangered. As a result, carnivorous animals that survive on these animals
would become extinct.
5.
Water from the oceans would not undergo the process of evaporation, due to
which
there
would be no rainfall. As a result, the amount of fresh water available on the
earth
would not increase. This would cause deficiency of water required for body.
6. Use
of solar energy would not be possible.
7.
Temperature of the part of earth facing the sun, would increase tremendously.
This
would
lead to faster evaporation of water and there would be no rainfall. As a
result. plant as well as animal life would come to an end.
Q (2) What efforts will you make to remove the
misconceptions about eclipses?
Ans. We will
make people understand and accept the fact that an eclipse is a natural
phenomenon like rain, spectrum, seasons. For which, we will take following
steps:
(1) We will provide the scientific information about
eclipses through various media.
(2) If an eclipse is going to take place in the near
future, we will create awareness about
it
through advertisements.
3. We
will give the experience of viewing an eclipse through special goggles and
telescopes.
4. We
will arrange a tour to observe an eclipse taking place in the region far away
from us.
5. We
will show people how an eclipse takes place by making models of the sun, the
moon and the earth.
6. We will
convince people that the intake of food during the period of eclipse does not
cause any ill effect on health.
Class 7 Science 16 – Natural Resources Questionnaire with Answer
16 – Natural Resources
Q. 1.
Answer the following questions :
(1)
Name the two important stages in the process of obtaining metals from ores?
Ans.
The two important stages in the process of obtaining metals from their ore are
extraction and purification.
(2) Write
the names of five minerals and the useful substances obtained from them.
Ans. Five
useful minerals are iron, manganese, bauxite, copper, mica..
(1) Iron
ore : Iron ore is used to make metal iron and steel. These are used for making
machinery, railway tracks, farming implements and articles such as needles,
pins etc. (2) Manganese : Manganese occurs in the form of various compounds
such as carbonate, silicate and oxide. These are used in the preparation of
medicines, electrical appliances and also for giving a pink tinge to glass.
(3)
Bauxite: Bauxite is the most important ore containing 55% aluminium. Aluminium
is a very good conductor of electricity and heat and thus used in electrical
wires. Since density of Aluminium is low, it is used in aeroplanes and other
transport vehicles.
(4)
Copper : Copper being a very good conductor of electricity, is used to make
electric wires. It is also used in radios, telephones, vehicles, and for making
kitchen utensils and statues.
(5)
Mica : Mica is used in ayurvedic medicines, dyes, electric machines and
equipment, wireless communication equipment, etc.
(3)
What is meant by fossil fuel? What are their types?
Ans.
The fuels which are made from the dead plants and animal that were buried
millions of years ago and subjected to extreme pressure and temperature in the
earth's crust due to geological processes are called 'fossil fuels'.
(4)
Make a list of the components we obtain from mineral oil.
Ans.
Crude mineral oil is a mixture of many hydrocarbon compounds. Components
obtained from mineral oil : Aviation petrol, gasoline, diesel, kerosene,
naptha, lubricant oils and tar.
(5)
Why should we prevent the wastage of fuel used for vehicles ?
Ans.
Petrol and diesel used in vehicles are fossil fuels made by geological
processes in the earth's crust over millions of years. Their reserves are
limited and may exhaust in this century. On combustion in the vehicle engine,
the fuels give out exhaust gases which are harmful and cause air pollution.
Therefore, we should prevent wastage of fuels used in vehicles.
(6)
What do we get from forests?
Ans.
Forests give us wood for construction of houses, furniture, farming implements
and
household
articles. We obtain cellulose fibres paper rubber, gum and aromatic substances.
In addition, we get fruits, bulbs, roots, sealing wax, catechu and dyes.
(7)
Why is the diversity of plants and animals in the forests declining?
Ans.
Owing to increasing human population more land is required. The forests are
clean cut to make land for dwelling, farming and industries. In farming only
useful grains and vegetables as food are grown. In cultivated forests suitable
few varieties used for manufacturing goods are planted. Such practices are
reducing diversity of plants in forests. On account of hunting and poaching
animal population is declining. Reduced diversity of plants does discourage
variety of wildlife to take shelter and have food.
(8)
What are the items included in ocean resources? What are their uses?
Ans.
Oceans have two types of resources : (1) The non-living resources of minerals
and fossil fuels. The mineral resources include Thorium and uranium from sand
deposits and Mangnese, Magnesium, Potassium, Iodine, Sodium and Sulphate from
salt. The fossil fuel resources are crude oil and natural gas. Thorium and
Uranium are used for production of atomic energy and electricity while salts of
elements mentioned are used for industrial productions from soaps to cloth and
paper. Oil and natural gas are used energy sources for industries and motor vehicles.
(2) The living or biological resources are fishes, dried shrimps and Bombay
duck powder, shells, shark and cod fishes and sea cucumbers. Fishes provide
protein food, fish liver oils give vitamins A & D, dried trash fish powder
as poultry feed. shells for decorative articles and active substances from sea
cucumbers for treating cancer and tumors.
(9)
What steps are taken for protection and conservation of natural resources!
Ans.
Steps to protect and conserve natural resources are: (1) Reserves of natural
resources are limited and their excessive use should be controlled otherwise
there will be early depletion. (2) Living resources are renewable but excessive
harvesting can lead to depletion. They require conservation of so that they can
regenerate year after year. (3) We must keep a control on use of resources to
maintain balance in nature.
(10)
How does the economic condition of a nation depend on its natural resources ?
Ans.
From natural resources of ores and minerals mining and industries develop raw
materials for manufacturing of goods, appliances and articles. The oil and
natural gas provide energy resources. Forests provide timber and a variety of
products while ocean resources provide cheap transport, food and various
chemicals. These natural resources together generate wealth for the nation and
income, occupations and employment for the citizens. Thus, economic condition
of a nation depends on availability of natural resources.
Q 2.Describe
natural resources with reference to the following three types:
(a)
Mineral resources :
Ans.
These resources are found in the earth's crust and taken out from the mines.
Some f them like gold, silver, copper, platinum and bismuth are found in free
state while iron, aluminium, mica are found in mixed state called ores. The
ores are separated and purified to get metals and non-metals which are used in
various manufacturing and chemical industries. Besides metals, there are
minerals like diamond, ruby, emerald, jade, zircon etc. which are used as gems.
Coal, petroleum and natural gas are also minerals which are used as fuels.
Thus, transport and production of electricity depend on mineral resources.
(b)
Forest resources :
Ans.
Forests are natural habitat of plants, animals and microbes. But forest cover
of the earth is rapidly declining due to increasing human population. Forests
perform protective and productive functions. Forests help in maintaining
climate, rainfall and oxygen. Forests give timber for housing and furniture,
besides various products like paper, rubber and medicines. The forests help
percolation of water into ground, reduce erosion of soil and control floods.
Forests maintain balance of atmospheric gases, reduce evaporation and protect
wildlife.
(c)
Ocean resources :
Ans.
Oceans provide both mineral and bio-resources. The mineral resources are
Thorium in sand and mineral oil and natural gas on the sea beds. Oil and gas
are used as fuels for electricity generation, motor vehicles and industries.
The mineral salts yield chemicals such as Sodium, Potassium, Magnesium,
Sulphates. The biological resources are fish and marine organisms which give
protein rich food, vitamins, iodine, common salt and nutrient minerals.
Drinking water is also obtained by RO (Reverse osmosis) technology. In
addition, electric power is obtained from wave, currents and tidal energy.
Q 3. Which medicinal plants will you grow on your
school premises and near
your house? Why? Ans. Neem, Ashwagandha, Asparagus,
Adulsa, Amla, Periwinkle, Cinnamon, Cinchona, bel, durva grass, tulsi,
turmeric, ginger can be planted near the school premises. These plants are easy
to grow and they are of immense help, therefore an attempt will be made to grow
them.
Q. 4.
Complete the flow chart:
