Physical Science

Through this chapter, we will learn about air in detail. We will understand the concept of wind and the importance of air in our lives. We will also know about things that work because of the air.

This chapter deals with materials and solutions. It describes the change in states such as solids, liquids, and gases. It briefs us on the solute, solvent, and solutions. It also describes the separation of soluble and insoluble substances.

Through this chapter, we will learn about the concept of light. We will discuss the artificial and natural sources of light, along with the properties of light. We will also understand the notion of shadows.

This chapter explores the concept of measurement of objects. It includes the methods of measuring length, weight and capacity. It also defines the units in which length can be measured and includes some examples and exercises for better learning.

In this chapter, we will learn about the concept of push and pull. We will also understand the meaning of force and various kinds of forces, such as muscular, gravitational, magnetic and frictional forces, through pictures.

This chapter highlights the concept of friction as a force that occurs in our day-to-day life. It explains the various uses of friction and the difficulties caused by it. It also discusses how to reduce friction between surfaces.

This chapter covers topics like houses long ago, village houses, houses in cities, as well as shelter of animals and birds.

This chapter covers topics like waste materials, waste in our houses, disposal of waste, urban and rural waste, and managing waste.

This chapter covers topics like water and its importance, sources of water, life in water, water level and flow in different seasons, evaporation and condensation, water cycle, purification of water, water pollution, and conservation of water.

This chapter covers topics like means of transport in the past, riding animals or mounts, pack animals, animals for special purposes, hooves and horseshoes, and care for animals.

This chapter covers topics like people involved in construction, building materials and tools, brick-making, and bridges.