Home » E-Books » NCERT » Archive by category "Class 11"

Paragraph on “What other kinds of energy can we use?” complete paragraph for Class 9, Class 10, Class 11 and Class 12

What other kinds of energy can we use? You have seen in the previous question the stages through which the Sun’s energy passes before we can tap it as the fossil fuel, petrol. It has taken millions of years for the world’s reserves of oil to be built up and we have consumed much of it in a few decades. We need energy in our homes and in industry and for...
Continue reading »

Paragraph on “How do we know what the bottoms of oceans are like?” complete paragraph for Class 9, Class 10, Class 11 and Class 12

How do we know what the bottoms of oceans are like? Over two-thirds of the Earth’s surface is covered with water. Most of this is very deep and we call it ocean. People cannot go down very far because the pressure of the water on them increases the deeper they go. Deep-sea divers wear protective clothing to stop their bodies being crushed. However, people have gone down to great depths using...
Continue reading »