Why do living things need nitrogen?

Where can primary succession begin?

What plant will most likely grow first in secondary succession?

Which of these might be a climax species?

What is the process where bacteria in soil change nitrogen gas into forms plants can absorb?

Which word best describes how carbon moves between the environment and living things?

Which word best describes how nitrogen moves between the environment and living things?

Name the process where a substance burns.

Name the process where plants release water vapor.

Name the process where organisms use oxygen and release carbon dioxide.

Name the process where a substance is broken down into simpler molecules.

Precipitation that is stored underground is ___________.

The gradual change of a community over time is ________.

The variety of species present in an area is called ___________.

Precipitation that runs from land to rivers and lakes is _______________.

The first living things to grow in an area are called __________.

After a fire, how will the number of species or biodiversity change over time?

Select an example of a disturbance that starts secondary succession.