Energy Flow in Ecosystems

Which statement accurately explains photosynthesis?

• A plant’s chlorophyll uses light energy to change water and carbon dioxide into sugar and oxygen.

• Chlorophyll uses the plant’s water to change oxygen into sugar and carbon dioxide.

• A plant’s light energy uses water to change chlorophyll into carbon dioxide and oxygen.

• Chlorophyll uses the plant’s sugar to change light energy into chloroplasts and carbon dioxide.

Which of the following is not true?

• Without the sun, Earth would be a frozen lifeless world.

• Energy from the sun travels to Earth in the form of light and heat.

• All energy on Earth can ultimately be traced back to the sun.

• Without the sun, Earth would have different forms of life.

What would happen without herbivores in a coral reef ecosystem?

• nothing would change

• the reef would lose most of its algae

• the reef would become overgrown with algae

• the fish would eat too many other fish

Why does every food chain begin with a producer?

• animals are all herbivores

• decomposers produce some food for animals

• animals produce their own food

• animals cannot create their own food

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NGSS.5-LS2-1

Which of the following is a primary consumer in a food chain?

• predators

• herbivores

• carnivores

• omnivores

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NGSS.5-LS2-1

Why are coral reefs found near the surface of the ocean?

• they need energy from the sun

• they need oxygen from above

• they avoid predators below

• they eat fish near the surface

Which of the following is a secondary consumer in a food chain?

• omnivore

• herbivore

• carnivore

• decomposer

What do decomposers use energy for?

• reproduction

• radiation

• photosynthesis

• scavenging

Which of the following is NOT a consumer?

• bacteria

• a tree

• a human

• a rabbit

How do consumers and decomposers interact in an ecosystem?

• consumers eat decomposers for energy

• decomposers release oxygen for consumers

• decomposers break down dead consumers

• decomposers take in carbon dioxide released by consumers