Unit 4 Flashcardizz Mid-Term Review

Front

How does nitrogen in the air get fixed into a form usable by living organisms?

Back

Bacteria in soil convert nitrogen into a form that is usable by living organisms.

Front

What is an aquifer?

Back

A layer of permeable rock that holds water in its pores below ground.

Front

What gas makes up most of the air we breathe?

Back

Nitrogen.

Front

What is the role of the sun in the water cycle?

Back

The sun provides heat energy for evaporation.

Front

What does the mesosphere protect the Earth from?

Back

The impact of meteors.

Front

Define nitrogen fixation.

Back

The process of converting nitrogen gas from the atmosphere into ammonia or related compounds in soil.

Front

What is the water cycle?

Back

The continuous movement of water on, above, and below the surface of the Earth.

Front

What is evaporation?

Back

The process by which water changes from a liquid to a gas or vapor.

Front

What is condensation?

Back

The process by which water vapor cools and changes back into liquid water.

Front

What is the significance of the ozone layer?

Back

It protects the Earth from harmful ultraviolet (UV) radiation from the sun.