Page 128 - SST Class 06

v Three important types of landforms are mountains, plains and plateaus.
v The hydrosphere comprises of oceans, seas and other water bodies and constitutes about 71 percent of
the Earth’s surface.
v The atmosphere is a sheet of air around the Earth and is made up of different gases.

v The biosphere is the narrow zone in which all three domains meet and make favourable conditions for life.
v It is necessary to keep the balance of the biosphere, else it may put life at risk.

A. Tick (3) the right option :
1. Tableland is another name for ____________ .

(a) plains (b) mountains (c) plateaus
2. The highest point in the lithosphere is ____________ .
(a) Mariana Trench (b) Mount Everest (c) both

3. Land constitutes about ____________ of the total Earth’s surface.
(a) 29 percent (b) 71 percent (c) 50 percent
4. The huge land masses are called ____________ .

(a) islands (b) continents (c) oceans
5. ____________ is the second largest continent after Asia.
(a) Africa (b) Europe (c) America

6. The largest island is ____________ .
(a) Blueland (b) Redland (c) Greenland
7. Some mountain ranges are completely ____________ .

(a) inhabitable (b) uninhabitable (c) none of these
8. The hydrosphere consists of ____________ .
(a) ocean (b) lake (c) both

B. Name any two :

1. domains (a) ____________ (b) ____________
2. landforms (a) ____________ (b) ____________
3. continents (a) ____________ (b) ____________
4. oceans (a) ____________ (b) ____________

5. water bodies (a) ____________ (b) ____________
6. gases present in the atmosphere (a) ____________ (b) ____________

C. Fill in the blanks with the help from the box :
Australia, Asia, Mount Everest, Mariana Trench, water, Dakshin Gangotri

1. The largest continent is ____________ .
2. The continent of ____________ is known as the island continent.
Contemporary Social Science-6
128