Question

14) Which layer of atmosphere is mainly responsible for absorption of ultraviolet radiation comir
from sun?
15) Give one constructive and destructive use of nuclear power.
16) What type of radiation is emitted by hot electric iron?
17) Name two dams whose construction was opposed by local people.
18) Why is a car parked in the sun with windows closed found to be hotter inside than outside?
19) Which metal is used to connect various solar cells?
20) Give one disadvantage of nuclear power.
21) Name the source of wind energy.
22) Why are thermal power plants set up near coal or oil fields?
23) How much energy requirement of India is met by hydro power plant?
24) What is bagasse? To what use is it put to?
25) Write the drawback of energy obtained from fusion.
26) A solar cell transforms energy of one form into another form. What are these two forms of
energy?
27) Windmill is used to produce electricity. Write the sequence of energy conversion in a wind
mill.
28) The mass number of three elements A, B and C are 2 and 235. Which one of them is suitabl
make a hydrogen bomb?
29) Which type of reflector is usually used in box type solar cooker?
30) The cost of production of electricity in a thermal power station located in
Bihar/Jharkhand/Odisha is lesser than in Gujarat/Maharashtra. Do you agree? Justify your
answer.
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Answer 1

(14) Ozone layer

(15)Nuclear power can be used to destroy a whole country.So this is destructive use.

Nuclear energy is used to produce electricity and it is used in space missions. So it is the constructive use.

(16)Infrared radiation

(18