Page 100 - SST Class 07

A. Tick (3) the right option :
1. The plants, animals and human beings are ______________ components.
(a) biotic (b) abiotic (c) none of these

2. ______________ is not a component of natural environment.
(a) rock (b) living organism (c) settlement
3. Lithosphere is a thin layer of ______________ .
(a) soil (b) water (c) air
4. ______________ is the mixture of gases, dust and water vapour.
(a) lithosphere (b) atmosphere (c) hydrosphere

5. ______________ is essential for all living beings to breathe.
(a) nitrogen (b) oxygen (c) carbon dioxide
6. ______________ is the narrow belt where the atmosphere, lithosphere and hydrosphere meets.
(a) exosphere (b) biosphere (c) both of these
7. Human environment includes ______________ .
(a) factories (b) families (c) all of these
8. ______________ is not a part of human environment.

(a) society (b) water (c) house
B. Match the following :
1. Environment u u Formed by the interaction of plants, animals and humans with
each other and with their environment.
2. Abiotic u u The interacting part of the atmosphere, hydrosphere and
lithosphere that supports life.
3. Lithosphere u u Seas, oceans and other water bodies surrounding the earth.
4. Hydrosphere u u Physical rather than biological.
5. Biosphere u u The solid outer covering of the earth’s surface consisting of rocks
and soils.
6. Ecosystem u u Surroundings of human beings.
C. Write ‘T’ for true and ‘F’ for false statements :

1. Abiotic components contain land, water, minerals etc.
2. The lithosphere is made up of rocks and soil.
3. Water which forms about three-fourths of the earth’s surface is called biosphere.
4. The gas which is very important for human existence is argon.
5. Atmosphere is the layer of air that surrounds the earth.
6. Human beings interact with the environment and modify it according to their needs.
D. Fill in the blanks :

1. The surrounding in which an organism lives is its ______________ .
2. ______________ components refer to non-living things.
3. The ______________ is the outer covering of the earth on which we all live.
Contemporary Social Science-7
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