Question

D. Tick (√) the most appropriate answer:
1. Burning of paper is an example of conversion of:
(a) heat energy into light energy
(b) chemical energy into heat energy
(c) chemical energy into light energy
(d) both (b) and (c)

2. The ultimate source of energy on the planet earth is:
(a) sun
(b) coal
(c) petroleum products
(d) molten lava within the earth

3. The cause of water cycle in nature is:
(a) chemical energy
(b) nuclear energy
(c) solar energy
(d) kinetic energy of wind

4. Strong wind turns the blades of wind turon because it possesses:
(a) potential energy
(b) kinetic energy
(C) both (a) and (b)
(d) none of these

5. When a person speaks in front of a micro phone, the sound energy changes into:
(a) loud sound energy
(b) magnetic energy
(c) chemical energy
(d) electric energy​

Answer 1

Answer:

1.ans-(a)

2.ans-(c)

3.ans-(b)

4.ans-(c)

5.ans-(a)

Answer 2

Answer:

1) heat energy into light energy.

2) Sun

3) solar energy

4) none of these

5) loud sound energy