Front

What does the Clean Air Act regulate?

Back

The Clean Air Act regulates vehicle emissions.

Front

What process releases nitrogen back into the atmosphere from decomposed matter?

Back

Denitrification.

Front

Why are introduced or invasive species often problematic?

Back

They often lack natural predators.

Front

What type of ecosystem service helps buffer against natural disasters?

Back

Regulating services.

Front

What is the top layer of soil called?

Back

Horizon A.

Front

What is the process of converting atmospheric nitrogen into a usable form for plants?

Back

Nitrogen fixation.

Front

What is the term for the variety of life in a particular habitat or ecosystem?

Back

Biodiversity.

Front

What is the primary source of energy for Earth's ecosystems?

Back

The Sun.

Front

What is the term for the gradual change in species composition in an ecosystem over time?

Back

Ecological succession.

Front

What is the role of decomposers in an ecosystem?

Back

Decomposers break down dead organic matter, recycling nutrients back into the soil.