Composition of the Atmosphere

Which gas makes up the greatest percentage of Earth's atmosphere?

• Argon

• Nitrogen

• Nitrous oxide

• Carbon dioxide

This circle graph shows the percentage of different gases in Earth's atmosphere. Which gas is represented by Gas #1?

• Carbon dioxide

• Hydrogen

• Nitrogen

• Oxygen

Earth's atmosphere is mainly composed of which gases?

• hydrogen, helium, oxygen, and argon

• nitrogen, oxygen, argon, and carbon dioxide

• nitrogen, hydrogen, argon, and carbon dioxide

• helium, hydrogen, oxygen, and carbon dioxide

A scientist compared the atmospheric composition of a newly discovered planet to the atmosphere of Earth. Which conclusion about the unknown planet can be made by using the information provided?

• It is not suitable for animals.

• It will sustain a small human population.

• It has enough oxygen for small mammals.

• It has many carbon dioxide releasing organisms.

Tags

NGSS.MS-LS1-5

The composition of the atmosphere is represented by the model. Identify the gases that would correctly represent the green and purple boxes.

b

c

nitrogen

oxygen

carbon dioxide

water vapor

According to the pie chart ​ ​ (a)   makes up about 20% of the atmosphere and ​ (b)   makes up about 79% of the atmosphere.

• argon

• carbon dioxide

• other gasses

• nitrogen

• oxygen

The ​ ​ ​ ​ (a)   ​ is made of mostly ​ (b)   and nitrogen.

• atmosphere

• oxygen

• helium

• argon

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

The pie chart shows the mixture of gases that compose the atmosphere. Which gas composes 21% of the atmosphere?

• Argon

• Oxygen

• Nitrogen

• Carbon dioxide

The majority of the troposphere (the layer of the atmosphere that is closest to Earth) consists of which two gases?

• Argon and hydrogen

• Nitrogen and oxygen

• Ozone and sulfur dioxide

• Helium and carbon dioxide

The table shows the volume percentages of four samples of atmospheric gas. Which sample BEST represents the composition of Earth's atmosphere?

• 1

• 2

• 3

• 4