Answer:
1. <u>Evaporation</u> :- The changing of a liquid to a gas.
2. <u>Automobile</u> :- The major source of pollution.
3. <u>Greenhouse</u><u> effect</u> :- Carbon dioxide and water vapour trapping heat gives off by Earth.
4. <u>Ozonosphere</u> :- Layer absorbing ultraviolet rays.
5. <u>Condensation</u> :- The changing of gas to a liquid.
6. <u>Ionosphere</u> :- Layer responsible for reflecting radio waves.
7. <u>Tr</u><u>o</u><u>posphere</u> :- The layer in which weather changes.