Unit 2 Ecosystems: Matter & Energy Summary

What are zombie fires?

• Fires that burn under ice throughout the winter

• Fires that occur only in summer

• Fires that are caused by zombies

• Fires that burn only in forests

What is peat?

• A type of rock

• A carbon-based material made from ancient plants

• A type of metal

• A kind of animal

Why does peat release CO₂ when burned?

• Because it is made of water

• Because it is carbon-based

• Because it is made of metal

• Because it is a type of gas

What is a carbon sink?

• A place where carbon is stored and not released

• A type of kitchen sink

• A place where carbon is produced

• A type of plant

Tags

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How did increased solar radiation in the Arctic affect plants?

• It decreased their growth

• It increased their potential to capture and store energy

• It made them disappear

• It turned them into animals

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What happens to plants when solar radiation decreases in the Arctic?

• They grow faster

• They die and form peat and permafrost

• They turn into rocks

• They become animals

Tags

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How do plants convert carbon dioxide and water?

• Through photosynthesis

• Through respiration

• Through decomposition

• Through combustion

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What is the role of photosynthesis in the Arctic ecosystem?

• It captures energy from sunlight and converts it to chemical energy

• It releases energy into the atmosphere

• It destroys energy

• It has no role

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What happens when permafrost thaws?

• Peat is exposed and can decompose and burn

• Peat turns into water

• Peat becomes a rock

• Peat disappears

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What do zombie fires release into the air?

• Oxygen

• Carbon dioxide

• Nitrogen

• Hydrogen