Enfant India English School
Class-9. Sub-science. Marks-80
Section-A
Q.A.) Chose the correct answer of the following (10)
1) Which one of the following is not the unit of energy?
(a) joule
(b) newton metre
(c) kilowatt
(d) kilowatt hour
2) Commercial unit of energy is
(a) joule
(b) kWh
(c) watt
(d) newton
3) Infectious protein is a characteristic of
(a) satellite viruses
(b) viroids
(c) prions
(d) gemini viruses
4) Salmonella causes
(a) tetanus
(b) T.B.
(c) polio
(d) typhoid
5) In 1978 scientists prepared human insulin by inserting the gene in
bacteria
virus
fungi
algae
6) Which is the renewable exhaustible natural energy resource?
1. Coal
2. Petroleum
3. Kerosene
4. Biomass
7) The natural place of an organism or community is known as
1. Niche
2. Biome
3. Habitat
4. Habit
8) Plants growing under shade are known as
1. Psamophytes
2. Sciophytes
3. Heliophytes
4. Monocots
9) Which is not the characteristic of a population?
1. Natality
2. Mortality
3. Stratification
4. Sex ratio
10) Which one is a ‘K’ selected species?
1. Aspergillus
2. Human
3. Taraxacum
4. Grass
Q.2) Attempt the following questions
1) Define Work and Energy
2) What is Heredity
3) What is atomic number of Carbon
4) Write down formula of Ohm's law
5) Define voltage
6) Write down formula of Bleaching powder
7) Write Down formula of Washing Soda and Baking soda
8) What is Eco-System
SECTION-B
Q.3) Attempt any Ten of the following questions (20)
1) Distinguish between DC and AC
2) Write down formula and Structure of Methane and Ethane
3) Define water pollution.
4) Name any two greenhouse gases.
5) It is easier to swim in a sea water than in river water. Why?
6) What is the advantage of classifying organism?
(b) Why some organisms are considered diploblastic?
7) Write down uses of Bleaching powder
8) Write down characteristics of Carbon
9) Define Environmental management
10) What is fermentation?
11) Define ‘Antibiotic’.
12) Which two main techniques are used in biotechnology? Why?
SECTION-C
Q.4) Attempt any TEN of the following questions (30)
1) Define the term tissue and explain the concept of tissue culture.
2) What is power & Define 1 watt of power.
3) Distinguish between monohybrid and dihybrid cross.
4) Explain Mendel’s monohybrid progeny with the help of any one cross
5) Write down the modes of infection and the preventive measures against fungal diseases
6) Write the uses of diamond & Graphite
7) Write scientific reasons Biogas is an eco-friendly fuel.
8) If a charge of 420 C flows through a conducting wire in 5 minutes what is the value of the current?
9) Energy flow through an ecosystem is ‘one way’.
10) Write notes on- Root pressure & Transpiration
11) Explain Human brain
12) Draw and label the diagrams Nephron and Human excretory system
SECTION-D
Q.5) Attempt any THREE of the following questions (12)
1) Answer the following questions.
a. Which vaccines are given to infants? Why?
b. How is a vaccine produced?
c. How do antibiotics cure disease?
d. Are the antibiotics given to humans and animals the same? Why?
2) What is meant by ‘chromosome’. Explain its types.
3) Write notes on Meteorology, Climatic factors, Industrial waste, Plastic waste,
4) Write the names of the following compounds and deduce their molecular masses
Na2 SO4 , K2 CO3 , CO2 , MgCl2
“Success is the sum of several small efforts repeated often day in and day out.”
All the best for your examination
Thank you
