Physics

This chapter discusses non-contact and contact forces along with balanced and unbalanced forces. Force is the push or a pull on an object with mass that causes it to change its motion. It also describes the buoyant forces and Archimedes principle.

This chapter covers the effects of chemical reactions on electric current. It describes the magnetic effects and chemical effects of electric current. It also discusses the potential difference and electric circuits, along with the types of cells.

This chapter discusses various kinds of disasters and their effects in detail. It explains the structure of disaster management authority, aspects of disaster management cycle, administration of first aid, and preparation for disaster management.

In this chapter, we will learn the sources of heat. It mentions the Sun as a natural source of heat. We will also learn about the measuring instruments such as thermometer and calorimeter with the help of pictorial representation.

This chapter discusses the concept of sound and its characteristics. It discusses the frequency of sound with relation to musical instruments. Topics such as audible and inaudible sounds and noise and noise pollution are also discussed here.

This chapter explains the laws of reflection. Light is the medium of illumination that makes sight possible. It discusses the types of reflection with the help of a diagram. It discusses the function and uses of a kaleidoscope and a periscope.

This chapter deals with constellations and planets of the solar system. We will learn about the properties of stars and the sun. It discusses the birth, stability, and evolution of stars. It also details the three end stages of the stars.