Unit 8 Test Review

Which gas makes up the majority of Earth’s atmosphere?

• Oxygen

• Argon

• Carbon Dioxide

• Nitrogen

What is needed to convert atmospheric nitrogen into a usable form?

• Sunlight

• Nitrogen-fixing bacteria

• Animals

• Fossil fuels

What caused CO₂ levels to drop and O₂ to increase billions of years ago?

• Lightning

• Asteroid impact

• Photosynthesis by algae

• Volcanoes

Tags

NGSS.MS-LS1-6

What does a barometer measure?

• Humidity

• Temperature

• Wind speed

• Air pressure

Where is atmospheric pressure highest?

• Mountaintops

• In space

• Sea level

• The equator

Which atmospheric layer contains weather?

• Mesosphere

• Thermosphere

• Troposphere

• Stratosphere

Tags

NGSS.MS-ESS2-5

What is the role of the ozone layer in the stratosphere?

• Produces rain

• Reflects sound

• Absorbs UV radiation

• Cools Earth’s surface

Which layer burns up most meteors?

• Thermosphere

• Mesosphere

• Troposphere

• Exosphere

Which layer has the highest temperature but feels cold due to thin air?

• Stratosphere

• Troposphere

• Mesosphere

• Thermosphere

What causes different seasons on Earth?

• Distance from the sun

• Earth’s tilt

• Moon phases

• Solar flares

Tags

NGSS.MS-ESS1-1