Chapter 18: The Atmosphere – Unit Test

What gas makes up about 78% of Earth’s atmosphere?

• Hydrogen

• Oxygen

• Carbon dioxide

• Nitrogen

What is the most important gas for breathing and supporting life?

• Helium

• Oxygen

• Argon

• Methane

What does the ozone layer protect us from?

• Gamma rays

• Infrared radiation

• UV radiation

• Carbon dioxide

Which layer of the atmosphere is where most weather occurs?

• Thermosphere

• Troposphere

• Mesosphere

• Stratosphere

Tags

NGSS.MS-ESS2-5

Which statement is true about the thermosphere?

• It reflects radio waves

• It contains the ozone layer

• It’s the coldest layer

• It has very dense air

What part of the atmosphere has gases well-mixed by wind and weather?

• Troposphere

• Heterosphere

• Homosphere

• Exosphere

What event in the old-earth view changed Earth's early atmosphere?

• Glaciers

• Volcanic eruptions

• Oxygen catastrophe

• Creation week

What element must nitrogen be converted into for plants to use it?

• Methane

• Hydrogen

• Ammonia

• Oxygen

What form of solar energy reaches Earth’s surface the most?

• Infrared

• X-rays

• Microwaves

• Gamma rays

What is the purpose of the magnetosphere?

• Reflect sunlight

• Block hurricanes

• Protect from solar wind

• Trap nitrogen