Coral Reefs Review

What percentage of the ocean is taken up by coral reefs?

• 10-12 percent

• 25 percent

• less than one percent

• more than fifty percent

What percentage of the ocean's sea life lives in coral reefs?

• 10 -15%

• 20%

• 45%

• 25%

Coral reefs are endangered by

• climate change

• overfishing

• pollution

• all of the above

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Coral reefs are home to how many species?

• thousands

• billions

• hundreds

• millions

Scientists fear coral reefs could die out by

• 2035

• 2050

• 2089

• 2020

What causes coral bleaching?

• oil spills

• warmer water temperatures

• overfishing

• red tide

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What is one way scientists trying to save the coral reefs?

• by growing coral and planting it in the ocean

• by restricting access to reefs

• by adding new species of fish to the reefs

• by adding fertilizer to the coral reefs

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What is the largest coral reef on the planet?

• Rainbow Reef, Fiji

• Great Chago Archipelago, Indian Ocean

• Amazon Reef, Brazil

• Great Barrier Reef, Australia

What builds up over time to form a reef?

• Sand
• Coral skeletons
• Fish bones
• Rocks

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Corals are

• plants

• animals

• protists

• bacteria