Food Webs

Producers are ...

• plants

• able to do photosynthesis

• also called autotrophs

• all of these are true

Arrows in a food web represent...

• eating

• sunlight

• energy

• matter

Photosynthesis is important because...

• it makes carbon dioxide

• it makes food for the food webs

• it makes water

• it's not important

All of these are types of consumers except...

• omnivores

• carnivores

• decomposers

• herbivores

Which group is not represented in the food web?

• producers

• primary consumers

• secondary consumers

• decomposers

What do the arrows in the food chain indicate about the flow of energy in an ecosystem?

• Energy is continuously recycled by the organisms in an ecosystem.

• Energy flows in one direction in an ecosystem, from producers to consumers.

• More of the available energy in an ecosystem is given to large animals than to small animals.

• Organisms at the end of the food chain receive more energy than those at the beginning.

In this energy pyramid, which organism would most likely be in level 2?

• bird

• fox

• caterpillar

• tree

Which one of the following is true of grass in an ecosystem?

• It converts oxygen to glucose.

• It produces carbon dioxide from oxygen and water.

• It produces glucose from carbon dioxide and water.

• It converts water to energy.

How would the removal of earthworms from the food chain affect the other organisms?

• The number of bass will increase.

• The number of crayfish will decrease.

• The crayfish will get their energy directly from the sun.

• The number of bass and ospreys (bird) will increase.

Which of the following organisms is a herbivore?

• fox

• ladybug

• butterfly

• snake