Page 207 - New Medley 5 Semester 2

REMEMBER THESE TERMS

Atmosphere : Layer of air around the earth
Pollution : Contamination
Pollutants : Harmful substances

CNG : Compressed Natural Gas
Global warming : Overall increase in the earth’s atmospheric temperature

Check Your Study

A. Tick () the correct answers.

1. e air is a

(a) Compound (b) Mixture of gases

(c) Element (d) Solid

2. e blanket of air around the earth is called
(a) Air pollution (b) Hydrosphere

(c) Ionosphere (d) Atmosphere

3. Air has maximum percentage of this gas.

(a) Carbon dioxide (b) Oxygen

(c) Nitrogen (d) Chlorine

4. Air pollution can cause
(a) Jaundice (b) Arthritis

(c) Asthma (d) High blood pressure

B. Fill in the blanks with the words given in the box.

pressure barometer oxygen soil 800

1. e atmosphere extends upto a height of km.

2. is needed for burning.

3. Plants get nitrogen from .

4. Air exerts in all directions.
5. An instrument used to measure air pressure is called a .

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