Question

4.
Answer the following questions :
(a) Name all the continents.
(b) Name all the oceans.
(c) How are the plains formed?
(d) Which areas are called deserts?
(e) What is the difference between an island and a peninsula?
1. Make a clay model of a mountain.
2. On the outline map of a world, labela
oceans.
.
Activity
2​

Answer 1

Ans 1)Name of all the continents

1. Asia
2. Europe
3. Australia
4. Africa
5. North America
6. South America
7. Antarctica

Ans 2)Name of all the oceans

• Pacific ocean
• Atlantic ocean
• Arctic ocean
• Indian ocean
• Southern ocean

Ans 3)Plains are generally formed by river and their tributaries. The river flow down the slopes of mountains and erode them. They carry forward the eroded material. Then they deposit their load consisting of stones, sand and salt silt along their courses and in their valleys.

Ans 4)A desert is a barren area of landscape where little precipitation occurs and, consequently, living conditions are hostile for plant and animal life. The lack of vegetation exposes the unprotected surface of the ground to the processes of denudation. About one-third of the land surface of the world is arid or semi-arid.

Ans 5) Islands

• An island is a secluded piece of land surrounded by water on all side
• Examples :-Borneo ,Java

Peninsula

• Peninsula is a piece of land surrounded by water on only three sides.
• Examples:-The Iberian Peninsula & The Peninsula of Baja