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| science quiz |
1. Consider the following statements
that increase carbon dioxide :
1. Photosynthesis
2. Weathering of organic matter
3. Volcanic Activities
4. Respiration
Which of the following processes
increase carbon dioxide in the Earth's carbon cycle?
A. 1 and 2 only
B. 1, 2 and 3
C. 2 3 and 4
D.all
Answer :- C. 2 3 and 4
2. In the context of which of the
following Indian wildlife is addressed by the name of Great Indian Fruit Bat?
A. Eagle
B. Bat
C.Vulture
D. crow
Answer: C. vulture
3. Differentiate between an atomic
bomb and a nuclear reactor. Select the correct statement from the given
statements?
A. Nuclear reactor is not controlled
by chain reaction
B. There is no chain reaction in
atomic bomb but there is chain reaction in nuclear reactor
C. Nuclear reactor can be controlled
by chain reaction
D. There is no chain reaction in a
nuclear reactor, there is any chain reaction in an atomic bomb
Answer: C. Nuclear reactor can be
controlled by chain reaction
4. Chlorofluorocarbon chemical which
is known as humic substance of ozone layer is used for
1. Used as a pressurizing agent in
aerosol cans
2. Used in the manufacture of flexible
foam
3. Used in the manufacture of tubeless
tires
Select the correct statement regarding
the use of chlorofluorocarbons
A.1 only
B. 2 and 3 only
C. 1 and 3 only
D.all
Answer :D. All
5. Which is the correct sequence of
the following substances in the increasing order of their density?
A. steel > mercury > gold
B. Gold > Mercury > Steel
C. steel > gold > mercury
D. Gold > Steel > Mercury
Answer: B. Gold >Mercury >Steel
6. Which one of the following is one
of the mathematical indices used to measure biodiversity at the local level to
represent species diversity within a habitat/community area?
A. Gamma Index
B. Beta Index
C. alpha index
D. Theta Index
Answer: C. alpha index
7. Which one of the following given
gases proves to be both harmful and beneficial for life on earth?
A. Neon
B.Nitrogen
C. Ozone
D. carbon dioxide
Answer :D. Carbon dioxide
8. In what context isotopes of any
atomic nucleus are represented ?
A. The number of protons and neutrons
in the atomic nucleus are the same, but the number of electrons is different
B. the number of protons and neutrons
in the atomic nucleus are different
C. The number of neutrons in the
atomic nucleus is the same, but the number of protons is different
D. The number of protons in the atomic
nucleus is the same, but the number of newtons is different
Answer :D. The number of protons in an
atomic nucleus is the same, but the number of newtons is different.
9. Which of the following is a mixture
of gasohol, choose the correct statement from the appropriate?
A. are made by mixing gasoline and
methanol
B. made by mixing gasoline and ethanol
C. are made by mixing gasoline and
propanol
D. made by mixing methanol and ethanol
Answer: B. made by blending gasoline
and ethanol
10. How is the pyramid of flow of
energy formed in any ecosystem?
A. First it becomes inverted then it
becomes upright
B. first becomes straight then reverse
C. always becomes straight
D. always reverse
Answer: C. always straightens
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