Class 10 Science

The amount of carbon present in the earth’s crust and in the atmosphere is quite meagre. The

Elements can be classified as metals or non-metals on the basis of their properties.

All organisms such as plants, animals, microorganisms and human beings as well as the physical

An electric current-carrying wire behaves like a magnet. Electricity and magnetism are linked

Electricity has an important place in modern society. It is a controllable and convenient form

The human eye uses light and enables us to see objects around us. It has a lens in its

An object reflects light that falls on it. This reflected light, when received by the eyes,

Reproductive processes give rise to new individuals that are similar, but subtly different.

Organisms look similar because their body designs are similar. If body designs are to be

In animals, control and coordination are provided by nervous and muscular

The biological process involved in the removal of these harmful metabolic wastes from the body

Blood transports food, oxygen and waste materials in our bodies. Blood consists of a fluid

The food material taken in during the process of nutrition is used in cells to provide energy

When we walk or ride a bicycle, we are using up energy. Even when we are not doing any apparent

The maintenance functions of living organisms must go on even when they are not doing anything

Acids are sour in taste and change the colour of blue litmus to red, whereas, bases are bitter

Whenever a chemical change occurs, a chemical reaction has taken place.