Unit 2 Science Test - 6th Grade

Front

What is an example of managing resources to reduce water pollution?

Back

Properly disposing of hazardous chemicals.

Front

What type of resource is nuclear energy classified as?

Back

Nonrenewable.

Front

What is the name of Layer 5 of the atmosphere, which extends from 320 km to outer space?

Back

Exosphere.

Front

What gases are primarily found in the exosphere?

Back

Hydrogen and helium.

Front

What is the density of gases in the exosphere?

Back

Extremely low.

Front

What is the name of Layer 4 of the atmosphere, which extends from 80 km to 320 km?

Back

Thermosphere.

Front

What are the main characteristics of the thermosphere?

Back

It is characterized by high temperatures and low densities.

Front

How does the temperature change in the thermosphere with altitude?

Back

Temperature increases with altitude.

Front

What is the significance of the exosphere in terms of space exploration?

Back

It is the outermost layer of the atmosphere, where satellites orbit.

Front

What is the role of the atmosphere in protecting Earth?

Back

It filters harmful solar radiation and maintains temperature.