energy flows through ecosystems

All energy on Earth comes from

• food.

• the sun.

• chemicals.

• non-living things.

An example of a producer is a

• fungus.

• animal.

• plant.

• person.

An example of a consumer is a(n)

• oak tree.

• dog.

• algae.

• phytoplankton.

An organism that must consume other organisms for nutrients.

• Consumer

• Producer

• Parasite

• Decomposer

Overlapping food chains with different pathways for the flow of food energy in an ecosystem

• Food Web

• Ecosystem

• Deciduous Forest

• Energy Transfer

Which organism do the owl and the weasel compete for in the food web?

• Hawk
• Spider
• Grasshopper
• Shrew

Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?

• There would be a decrease in the small bird population.
• There would be a decrease in the grass/flowers population.
• There would be a decrease in the mice population.
• There would be an increase in the grass/flowers population.

The arrows in a food chain or web represents what?

• They point to the organism that is being eaten.
• It shows how sunlight flows within an ecosystem.
• They show what direction the energy is flowing between organisms. 
• They represent how water is transferred within a habitat.

What is an invasive species?

• A native (naturally found) species which are added to an area.

• A non-native (not naturally found) species added to an area.

• A keystone species in an environment

• none of the above

Producers get their energy from:

• the sun

• eating only plants

• eating plants and animals

• eating only animals