7.3.1 Qasim

Question 1

Atmosphere

Answer 1

The envelope of gases surrounding the earth or another planet.

Question 2

Altitude

Answer 2

The height of an object or point in relation to sea level or ground level.

Question 3

Density

Answer 3

The degree of compactness of a substance

Question 4

Troposphere

Answer 4

The lowest region of the atmosphere, extending from the earth’s surface to a height of about 3.7–6.2 miles (6–10 km), which is the lower boundary of the stratosphere.

Question 5

Stratosphere

Answer 5

The layer of the earth’s atmosphere above the troposphere, extending to about 32 miles (50 km) above the earth’s surface (the lower boundary of the mesosphere).