Water is very important for all living things. It is found covering nearly 70% of the Earth surface. We need water more than food, because in fact, we can survive much longer without food than without water to drink. Beside that, many of our daily activities use water such as taking a bath, cooking, washing, swimming, and so on. Plants and animals need water to keep alive. What about fish?
What Is Water?
Water is a substance made of Hydrogen and Oxygen atoms. Water can exist in three states:
- Ice. When the temperature is below 0 degree Celsius, water will freeze and become ice.
- Liquid. This is water that we drink and use to take shower.
- Vapor. When the temperature gets above 100 degree Celsius, water will evaporate and turn into gas state called vapor.
The Water Cycle
The amount of water today on the Earth is the same as there has always been. The water keeps moving on an endless cycle called water cycle.
Water evaporates from river, ocean, living things and others. Then, it goes to atmosphere and form clouds. Clouds turn into rain or snow, and it falls to the ground. The process begin again and again.
Written by SAA
