Answer the following questions briefly.

(a) What are the four major domains of the earth?

(b) Name the major continents of the earth.

(c) Name the two continents that lie entirely in the Southern Hemisphere.

(d) Name the different layers of atmosphere.

(e) Why is the earth called the ‘blue planet’?

(f) Why is the Northern Hemisphere called the Land Hemisphere?

(g) Why is the Biosphere important for living organisms?

Tick the correct answers:

(a) The mountain range that separates Europe from Asia is

(i) the Andes (ii) the Himalayas (iii) the Urals

(b) The continent of North America is linked to South America by

(i) an Isthmus (ii) a Strait (iii) a Canal

(c) The major constituent of atmosphere by per cent is

(i) Nitrogen (ii) Oxygen (iii) Carbon dioxide

(d) The domain of the earth consisting of solid rocks is

(i) the Atmosphere (ii) the Hydrosphere (iii) the Lithosphere

(e) Which is the largest continent? (i) Africa (ii) Asia (iii) Australia

(a) The deepest point on the earth is __________ in the Pacific Ocean.

(b) The __________ Ocean is named after a country.

(c) The __________ is a narrow contact zone of land, water and air that supports life.

(d) The continents of Europe and Asia together are known as __________.

(e) The highest mountain peak on the earth is __________.