Matter and Energy in Ecosystems

Front

What is a producer?

Back

An organism that uses sunlight or chemical energy to make its own food.

Front

Photosynthesis ________ carbon dioxide in the atmosphere, cellular respiration __________ it.

Back

Photosynthesis reduces carbon dioxide in the atmosphere, cellular respiration increases it.

Front

Which of the following is true of a model of feeding relationships in an ecosystem?

Back

There is one food web and several overlapping food chains.

Front

Photosynthetic producers convert water and carbon dioxide into _______________.

Back

Oxygen and a Carbohydrate.

Front

Matter cycles through food webs and biogeochemical cycles. True or False?

Back

True.

Front

What is photosynthesis?

Back

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

Front

What role do decomposers play in an ecosystem?

Back

Decomposers break down dead organisms and waste, returning nutrients to the soil.

Front

Define a food web.

Back

A complex network of feeding relationships among various organisms in an ecosystem.

Front

What is cellular respiration?

Back

The process by which cells convert glucose and oxygen into energy, carbon dioxide, and water.

Front

What is the primary source of energy for most ecosystems?

Back

The Sun.