Unit Review - Organisms and Environments

An organism is -

• A plant

• An animal

• A single living thing

• All of the above

The living and non-living things working together in an environment

• Ecosystem

• Population

• Community

• Atmosphere

Why are decomposers an important part of ecosystems?

• They break down dead organisms to return nutrients to the soil.

• They produce their own food for survival.

• They play a role in preventing weathering and erosion.

• They provide most of the energy to consumers.

How is this bee interacting with living things in its environment?

• It is breathing the fresh air.

• It is enjoying the sunshine.

• It is collecting pollen from the flower.

How is this lizard interacting with non-living things in his environment?

• It is eating an insect.

• It is sunning itself on a rock.

• It is hiding among the plants.

A connection of food chains with many food energy paths in an ecosystem is a ____________.

• ecosystem
• food web
• environment
• population

In a food web, what do the arrows represent?

• The direction of predator to prey

• Smaller to larger organisms

• Larger to smaller organisms

• The direction of the energy flow

The energy in a food web starts with the...

• Moon

• Seed

• Sun

• Predator

What do you call an organism that makes its own food?

• Consumer

• Producer

• Herbivore

• Decomposer

Which organism's energy is transferred most in this food web?

• Hawk, because they are predators in this web.

• Grasshoppers, because they are at the bottom of this web.

• Marsh grass, because they are producers in this web.

• Shrew, because they support two chains in this web.