Energy Flow in Ecosystems

What is the main source of energy for most ecosystems?

• Geothermal energy

• Moonlight

• The Sun

• Heat from animals

What do plants use sunlight and carbon dioxide for?

• To produce heat

• To make their own food

• To eat other animals

• To reflect light

What are animals that eat plants called?

• Carnivores

• Decomposers

• Primary producers

• Primary consumers

When energy moves from plants to animals that eat them, what happens to most of the energy?

• It is all stored in the animal.

• It is mostly lost as heat.

• It is used to make more plants.

• It disappears completely.

What do we call a living thing that eats other animals that have eaten plants?

• A primary consumer

• A secondary consumer

• A tertiary consumer

• A producer

What happens to the energy in plants and animals after they die?

• It disappears completely.

• It is used by decomposers.

• It turns into light.

• It goes back to the sun.

Where do plants get the main building blocks (matter) they need to grow?

• From eating other plants.

• From the sun's energy.

• From carbon dioxide in the air.

• From the heat in the soil.