Gases in the Atmosphere

Question 1

Which gas is the most abundant (highest percentage) in the atmosphere

Answer 1

Nitrogen

Question 2

Which gas do many organisms use to breath?

Answer 2

Oxygen

Question 3

Which gas is a “greenhouse” gas and helps keep the Earth warm enough for life?

Answer 3

Carbon Dioxide

Question 4

Which gas is a form of oxygen and helps protect organisms from too much ultraviolet radiation?

Answer 4

Ozone

Question 5

Which gas can change its state of matter to become precipitation?

Answer 5

Water vapor

Question 6

What is the layer of gases called that surrounds the Earth?

Answer 6

The atmosphere

Question 7

What word describes the conditions in the Earth’s atmosphere at a particular time and place?

Answer 7

Weather

Question 8

What word describes the amount of gas in a given volume of air?

Answer 8

Density

Question 9

What is the weight of the atmosphere exerting a force on a surface called?

Answer 9

Air pressure

Question 10

Why does air pressure not crush objects and organisms on the Earth?

Answer 10

Air pressure acts in all directions. A downward force is balanced by an upward force.

Question 11

What is the instrument used to measure air pressure?

Answer 11

A barometer

Question 12

What is the instrument used to measure air temperature?

Answer 12

A thermometer

Question 13

How does air pressure change as altitude increases?

Answer 13

As altitude increases, air pressure decreases.

Question 14

In which layer of the atmosphere does most weather occur?

Answer 14

Troposphere

Question 15

In which layer of the atmosphere is the ozone layer found?

Answer 15

Stratosphere

Question 16

In which layer of the atmosphere do airplanes fly to avoid weather?

Answer 16

Stratosphere

Question 17

Which layer of the atmosphere is the coldest layer?

Answer 17

Mesosphere

Question 18

In which layer of the atmosphere do meteors burn up?

Answer 18

Mesosphere

Question 19

In which layer of the atmosphere do the auroras occur?

Answer 19

Thermosphere

Question 20

The radio waves reflect back to Earth off of which layer?

Answer 20

Thermosphere

Question 21

In which layer do satellites orbit?

Answer 21

Exosphere

Question 22

Which layer of the atmosphere is closest to Earth’s surface?

Answer 22

Troposphere

Question 23

Which layer of the atmosphere is in the middle?

Answer 23

The mesosphere

Question 24

What does the prefix “thermo” that is part of the thermosphere mean?

Answer 24

Heat

Question 25

Which layer of the atmosphere blends into outer space?

Answer 25

Exosphere

Question 26

What are three natural sources of air pollution?

Answer 26

Volcanoes, Forest fires, and dust storms

Question 27

What are man-made sources of air pollution?

Answer 27

Cars, factories, and power plants that burn fossil fuels.