Earth's Atmosphere Quiz

What percentage of the Earth's atmosphere is composed of nitrogen?

• 21%

• 78%

• 1%

• 50%

When did oxygen start to accumulate in Earth's atmosphere?

• ~1.5 billion years ago

• ~2.5 billion years ago

• ~3.5 billion years ago

• ~4.5 billion years ago

Tags

NGSS.HS-LS2-5

What is the percentage of oxygen in the Earth's atmosphere?

• 78%

• 21%

• 1%

• 5%

What role does water vapor play in the atmosphere?

• It is a major component of the ozone layer.

• It absorbs heat given off by the Earth and some solar energy.

• It is the primary source of oxygen.

• It reflects sunlight back into space.

Tags

NGSS.MS-ESS2-6

What is the chemical formula for ozone?

• O2

• O3

• O4

• O

Tags

NGSS.MS-PS1-1

Why is the ozone layer critical to life on Earth?

• It provides oxygen for breathing

• It absorbs potentially harmful UV radiation from the sun

• It reflects sunlight to keep the Earth warm

• It produces rain

Where is most of the ozone located in the atmosphere?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

What would happen if the ozone did not filter most UV radiation?

• The Earth would become colder

• The Earth would be uninhabitable for many living organisms

• The Earth would have more oxygen

• The Earth would have more rain

What are air pollutants?

• Airborne particles and gases that are harmless to organisms

• Airborne particles and gases that occur in concentrations large enough to endanger the health of organisms

• Only gases that are emitted from factories

• Only particles that are emitted from vehicles

Tags

NGSS.MS-ESS3-3

NGSS.MS-ESS3-4

What accounts for almost half of all primary pollutants?

• Industrial emissions

• Emission from transportation vehicles

• Natural sources

• Agricultural activities