Chemistry

The chapter discusses fibre and its types. It discusses how the fabrics are made from fibres. The various methods are discussed. It also states the evolution of clothing since olden times.

In this chapter, we will look into the need of sorting materials into groups in detail. We will shed light on the concept of grouping the materials based on their properties. Furthermore, we will study how grouping makes the theory convenient.

The chapter discusses the separation of substances. We need to separate harmful or non-useful things from the substance before we use it. The various methods of separation are discussed here.

The chapter discusses the changes around us. Some change can be reversed and some cannot be reversed. The different ways of bringing change are discussed here.

All living things need water to survive. This chapter discusses how much water we use, source of water, water cycle, back to the oceans, what if it rains heavily, how we can conserve water and many factors related to it.

This chapter discusses the presence of air in the environment, the components of the air, availability of oxygen to the plants and the living beings, and how oxygen is replaced.