Food Webs: Cycling of Matter & Flow of Energy Quiz

What is an ecosystem?

• A model that shows us how matter cycles and energy flows in an ecosystem.

• A system of living and nonliving things in a particular area or environment.

• A simple diagram to show how energy moves from one living thing to another.

• A group of living things that break down dead things.

What is the role of producers in an ecosystem?

• They produce their own food using photosynthesis.

• They are at the top of the food chain.

• They decompose dead matter.

• They consume other living things.

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Why are decomposers important in an ecosystem?

• They are at the top of the food chain.

• They produce their own food.

• They break down dead matter, recycling nutrients back into the soil.

• They consume other living things.

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What is the main source of energy for all ecosystems?

• Water

• Carbon dioxide

• Sunlight

• Oxygen

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What happens to energy as it moves up the food chain?

• It increases.

• It remains the same.

• It decreases.

• It disappears completely.

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What is a food web?

• A group of living things that break down dead things.

• A system of living and nonliving things in a particular area or environment.

• A model that shows us how matter cycles and energy flows in an ecosystem through the intertwining of food chains.

• A simple diagram to show how energy moves from one living thing to another.

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What is photosynthesis?

• A process where decomposers break down dead matter.

• A process where animals make their own food.

• A chemical process by which plants make their own food using energy from the sun.

• A process where consumers eat other living things.

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What is cellular respiration?

• A process where consumers eat other living things.

• A process where plants make their own food.

• A process where decomposers break down dead matter.

• A chemical process within cells where sugar and oxygen react to form carbon dioxide and water, releasing energy.

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Why are there typically more producers than tertiary consumers in an ecosystem?

• Tertiary consumers produce their own food.

• Producers are at the top of the food chain.

• Only about 10% of energy is passed on to the next organism in a food chain.

• Producers decompose dead matter.

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What do marine biologists study that relates to food chains?

• The chemical process of photosynthesis.

• The cycling of matter in terrestrial ecosystems.

• Food chains within ocean ecosystems and their impact on human food supply.

• The role of decomposers in the soil.

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