Matter Cycles
Photo-synthesis
Decom-posers
Energy in Ecosystems
Human Impact and Ecosystem Changes
100

The gas that animals breathe in

What is oxygen?

100

Plants need these things for photosynthesis

What is sunlight, air, and water?

100

List 2 examples of what decomposers break down?

What is dead plants, dead animals, and waste? (any 2)

100

This is the main source of energy for almost all food webs

What is the sun?

100

Recycling is most similar to the job of this type of organism

What are decomposers?

200

The gas that animals breathe out

What is carbon dioxide?

200

This gas enters the leaves of plants during photosynthesis

What is carbon dioxide?

200

Decomposers get this element from what they consume.

What is nitrogen?

200

Animals that eat plants are called this

What are consumers?

200

True or false: Plants mainly need soil to grow. (explain why or why not)

What is false — they mainly need sunlight, water, and air.

300

Plants release this gas back into the air

What is oxygen?

300

This captures sunlight energy inside a plant's leaves

What is chlorophyll?

300

Decomposers are important in an ecosystem because they do this

What is they return nutrients to the soil so plants can grow?

300

A robin gets energy from a worm because...

What is the worm contains energy from the food it has eaten?

300

This is how you could collect evidence that plants don’t need soil to grow

What is grow plants in water and compare them to plants in soil. (hydroponics)

400

Name two ways animals help cycle matter in ecosystems.

What is breathing, giving off waste, or decomposing when they die? (any 2)

400

Name both main products of photosynthesis

What is sugar (food/glucose) and oxygen?

400

If decomposers disappeared, this would happen to the soil

What is it would lose nutrients and become less healthy for plants?

400

This is the first step you should draw in an energy flowchart

What is the sun?

400

One way to model how an invasive species affects an ecosystem

What is add it to a food web and show how it reduces resources or changes populations.

500

My own role in the oxygen–carbon dioxide cycle

What is I breathe in oxygen and breathe out carbon dioxide, which plants use for photosynthesis?

500

Explain how photosynthesis connects plants and animals in an ecosystem.

What is plants make oxygen and food using sunlight, and animals rely on both to survive.

500

Explain how decomposers help continue the nitrogen cycle in ecosystems.

What is they break down waste and dead matter, releasing nitrogen back into the soil for plants?

500

Explain how the energy from the sun ends up in a wolf (think broad terms)

What is sun → plants/producers → herbivores → carnivores (the wolf eats animals that got energy from plants) (omnivores can be added in)

500

This is why cattle might eat more in cold weather

What is they use more energy to stay warm and need more food to replace it?

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