Science Chapter III

Question 1

Atmosphere

Answer 1

The mass of air surrounding a planet.

Question 2

Atmospheric Pressure

Answer 2

The pressure exerted by the atmosphere on all objects within it.

Question 3

Barometer

Answer 3

An instrument used to measure atmospheric pressure.

Question 4

Homosphere

Answer 4

The lower layer of earth’s atmosphere, which exists from ground level to roughly 80 kilometers (50 miles) above sea level.

Question 5

Hetrosphere

Answer 5

The upper layer of earth’s atmosphere, which exists higher than roughly 80 kilometers (50 miles) above sea level.

Question 6

Troposphere

Answer 6

The region of the atmosphere that extends from ground level to roughly 11 kilometers (5 miles) above sea level.

Question 7

Stratosphere

Answer 7

The region of the atmosphere that spans altitudes of roughly 11 kilometers to 48 kilometers (30 miles)

Question 8

Mesosphere

Answer 8

The region of the atmosphere that spans altitudes of roughly 48 kilometers to 80 kilometers (50 miles)

Question 9

Jet Streams

Answer 9

Narrow bands of high-speed winds that circle the earth, blowing from west to east.

Question 10

Heat

Answer 10

Energy that is transferred as a consequence of temperature differences.

Question 11

Temperature

Answer 11

A measure of the energy of random motion in a substance’s molecules.

Question 12

Ionosphere

Answer 12

The region of the atmosphere between the altitudes of roughly 65 kilometers and 330 kilometers, where the gasses are ionized.

Question 13

Thermosphere

Answer 13

The region of the atmosphere between altitudes roughly 80 kilometers and 460 kilometers.

Question 14

Exosphere

Answer 14

The region of the atmosphere above an altitude of roughly 460 kilometers.