Study Material

Force – Study Material

For many centuries, the problem of motion and its causes had puzzled scientists and philosophers. A ball on the ground, when given a small hit, does not move forever. Such...

Motion – Study Material

In everyday life, we see some objects at rest and others in motion. Birds fly, fish swim, blood flows through veins and arteries and cars move. Atoms, molecules, planets, stars...

Defects of Vision – Study Material

Sometimes, the eye may gradually lose its power of accommodation. In such conditions, the person cannot see the objects distinctly and comfortably. The vision becomes blurred due to the refractive...

Universal Law of Gravitation – Study Material

10.1.1 UNIVERSAL LAW OF GRAVITATION Every object in the universe attracts every other object with a force which is proportional to the product of their masses and inversely proportional to...

Mirage – Study Material

9.4.1 Total internal reflection in nature and its technological applications On hot summer days, the air near the ground becomes hotter than the air at higher levels. The refractive index...

Twinkling of Stars – Study Material

The twinkling of a star is due to atmospheric refraction of starlight. The starlight, on entering the earth’s atmosphere, undergoes refraction continuously before it reaches the earth. The atmospheric refraction...

Food Crops in India – Study Material

A variety of food and non food crops are grown in different parts of the country depending upon the variations in soil, climate and cultivation practices. Major crops grown in...

Industrial Pollution in India – Study Material

Industrial Pollution and Environmental Degradation Although industries contribute significantly to India's economic growth and development, the increase in pollution of land, water, air, noise and resulting degradation of environment that...

Page 2 of 3 1 2 3

CBSE Board Quick Links