Step-by-step explanation:
1. Change of the state of water as the temperature is increased or decreased -
- As the temperature of water is increased , the liquid state changes to gaseous state .
- As the temperature of water is decreased , the liquid state changes to solid state .
2.
Greenhouse effect -
It is the process by which the the radiations of the sun get trapped in the atmosphere of the Earth , and increases the temperature of the surface of the planet , and thereby avoiding the situation of the freeing of the Earth's surface .
The two main and important greenhouse gases are - Carbon dioxide , methane , etc .