Final Review #4 (N14-N18)

Front

What first created oxygen on the Earth?

Back

Cyanobacteria are responsible for the first production of oxygen through photosynthesis, significantly altering Earth's atmosphere.

Front

Which layer of the atmosphere is a 'middle' layer, between the Stratosphere and Thermosphere?

Back

The Mesosphere is the middle layer of the atmosphere, known for its cold temperatures and where meteors burn up.

Front

The atmosphere is divided into different layers based upon differences in ____________ as altitude increases.

Back

Temperature is the key factor that differentiates the layers of the atmosphere as altitude increases.

Front

What gas is released into the atmosphere by plants during photosynthesis?

Back

Oxygen is released by plants during photosynthesis.

Front

What gas is released into the atmosphere by humans and animals breathing out?

Back

Carbon Dioxide is released by humans and animals during respiration.

Front

What are substances that trap heat in the lower atmosphere?

Back

Greenhouse gases, including water vapor, carbon dioxide, methane, and ozone, trap heat and help maintain Earth's temperature.

Front

What is the primary function of the ozone layer?

Back

The ozone layer protects life on Earth by absorbing the majority of the sun's harmful ultraviolet radiation.

Front

What is the composition of Earth's atmosphere?

Back

Earth's atmosphere is primarily composed of nitrogen (78%), oxygen (21%), and trace amounts of other gases.

Front

What is the significance of the Troposphere?

Back

The Troposphere is the lowest layer of the atmosphere where weather occurs and where humans live.

Front

What role do greenhouse gases play in Earth's climate?

Back

Greenhouse gases help to keep Earth's surface warm by trapping heat, which is essential for maintaining a stable climate.