Exploring Earth's Atmosphere and Layers

What is the primary gas in Earth's atmosphere?

• Oxygen

• Nitrogen

• Carbon Dioxide

• Water Vapor

Which process is primarily responsible for maintaining oxygen levels in the atmosphere?

• Nitrogen Cycle

• Photosynthesis

• Evaporation

• Condensation

Tags

NGSS.MS-LS1-6

How does water vapor enter the atmosphere?

• Photosynthesis

• Cellular Respiration

• Evaporation and Transpiration

• Nitrogen Fixation

Tags

NGSS.MS-ESS2-4

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

• It absorbs carbon dioxide

• It bounces UV radiation back into space

• It increases atmospheric pressure

• It releases oxygen

Which layer of the atmosphere is where most commercial planes fly?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

Explain how gravity affects atmospheric pressure.

• Gravity pulls the atmosphere away from the planet, reducing pressure.

• Gravity holds the atmosphere in place and causes atmospheric particles to press down on the planet, creating pressure.

• Gravity has no effect on atmospheric pressure.

• Gravity increases the temperature of the atmosphere, affecting pressure.

Describe the temperature trend in the troposphere as altitude increases.

• Temperature increases as altitude increases.

• Temperature remains constant as altitude increases.

• Temperature decreases as altitude increases.

• Temperature fluctuates randomly as altitude increases.

What happens to atmospheric pressure as altitude increases in the stratosphere?

• It increases significantly.

• It remains constant.

• It decreases until it nearly matches space.

• It fluctuates unpredictably.

Identify the layer of the atmosphere where meteorites burn up and become visible.

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

How do CFCs affect the ozone layer?

• They strengthen it.

• They have no effect on it.

• They weaken it.

• They convert it into oxygen.