CAST Basic Earth and Space Science Review

Front

About how much of Earth's atmosphere is oxygen?

Back

20%

Front

What is the most abundant gas in Earth's atmosphere?

Back

Nitrogen

Front

The transfer of heat through the movement of fluids, such as air or water, is known as ____________.

Back

Convection

Front

Earth's magnetic field is generated by the movement of molten metal in the outer core. True or False?

Back

True

Front

The Moon's surface shows no signs of erosion because it lacks water and an atmosphere. True or False?

Back

True

Front

What is the primary function of Earth's atmosphere?

Back

To protect life by filtering harmful solar radiation and maintaining temperature.

Front

Define conduction in the context of heat transfer.

Back

Conduction is the transfer of heat through direct contact between materials.

Front

What is radiation in terms of heat transfer?

Back

Radiation is the transfer of heat in the form of electromagnetic waves.

Front

Explain the greenhouse effect.

Back

The greenhouse effect is the warming of Earth's surface due to the trapping of heat by greenhouse gases in the atmosphere.

Front

What role does nitrogen play in the atmosphere?

Back

Nitrogen is a major component of the atmosphere, making up about 78%, and is essential for plant growth.