Ecosystems Unit

Where do water weeds get the matter that they need to make food?

• from the scales of fish

• from the pond water

• from the nutrients in the pond mud

• from the waste materials produced by snails

Which of the following is a producer?

• grass

• mushrooms

• a caterpillar

• blue jay

Which of the following is a decomposer?

• blue jay

• caterpillar

• grass

• mushroom

Which of the following are consumers?

• blue jay

• caterpillar

• grass

• mushroom

How do humans depend on the sun for energy?

• They absorb sunlight and make energy in order to live.

• They use energy from the sun to make minerals in the body.

• All food sources for humans use energy that originally came from the sun.

• All the factories that make food for humans get electricity from solar energy.

The continuous movement of matter within an ecosystem is called the

• water cycle

• life cycle

• matter cycle

• decay cycle

Select all examples of fungi.

• mold

• mushrooms

• plants

• yeast

• mildew

If there were no bacteria and fungi, what would happen to an ecosystem? Select all that apply.

• The ecosystem wouldn't survive.

• Nothing would happen; the ecosystem would be fine.

• Matter wouldn't return to the environment.

• Dead organisms and animal waste wouldn't decompose.

• Plants wouldn't have everything they need to grow healthy.

An ecosystem does not need additional supplies of air or soil because

• air and soil get recycled by plants and animals through their waste.

• plants take in oxygen and release carbon dioxide.

• air and soil do NOT get recycled by plants and animals through their waste.

• once air is used up it is gone.

The sun provides matter that helps the algae grow.

• TRUE

• FALSE