Nature Cycles

Front

What do all organic molecules contain?

Back

Carbon

Front

Why do living things need nitrogen?

Back

To build new cells

Front

Where can primary succession begin?

Back

In a place with only rocks

Front

What is the process where a substance is broken down into simpler molecules?

Back

Decomposition

Front

What is precipitation that runs from land to rivers and lakes called?

Back

Run off

Front

What is the water cycle?

Back

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

Front

What is photosynthesis?

Back

The process by which green plants use sunlight to synthesize foods with the help of chlorophyll.

Front

What is the role of decomposers in an ecosystem?

Back

Decomposers break down dead organic material, returning nutrients to the soil.

Front

What is the difference between primary and secondary succession?

Back

Primary succession occurs in lifeless areas, while secondary succession occurs in areas where a disturbance has destroyed an ecosystem but left the soil intact.

Front

What is the significance of the nitrogen cycle?

Back

The nitrogen cycle is essential for converting nitrogen into forms that plants and animals can use.