Natural Resources

The chapter states that water is an essential commodity. It is used for various chores, but it is not easily available. We will learn that seawater cannot be used for drinking and cooking. It explains how rainwater can be harvested to water crops.

This chapter explains that air comprises of gas, water, dust and smoke. It talks about humidity, which refers to the amount of water vapour present in the air. We also learn about the different breathing organs of animals.