Understanding Coral Reefs

Coral reefs are typically found in ______ water in the tropics.

• Deep

• Cold

• Shallow

• Fresh

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Coral reefs are located between which two tropics?

• Tropic of Cancer and Tropic of Capricorn

• Tropic of Cancer and Tropic of Gemini

• Tropic of Capricorn and Tropic of Leo

• Tropic of Cancer and Tropic of Virgo

What is one of the major benefits of coral reefs?

• They increase desert areas

• They protect coastlines from storms and erosion

• They cause hurricanes

• They reduce fish populations.

Over half a billion people depend on reefs for ______.

• Space exploration

• Food, income, and protection

• Desert farming

• Mountain climbing

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Fill in the blank: The largest reef networks were found in the Great Barrier Reef and Coral Triangle, the Caribbean, the Red Sea, eastern Africa, and _________.

• A) Near Fiji

• B) Near Japan

• C) Near Hawaii

• D) Near Madagascar

What percentage of the ocean's area do coral reefs occupy?

• 0.1%

• 1%

• 10%

• 25%

Between which two Tropics are coral reefs usually located?

• Tropic of Cancer and Tropic of Capricorn

• Tropic of Cancer and Tropic of Gemini

• Tropic of Capricorn and Tropic of Leo

• Tropic of Leo and Tropic of Gemini

Reef-building corals are tiny colonial animals that produce a hard outer skeleton of what material?

• Limestone

• Sandstone

• Granite

• Marble

What is the primary function of reef-building corals?

• To provide food for fish

• To form the physical foundation of coral reefs

• To clean the ocean

• To produce oxygen.

What is the main difference between hard corals and soft corals?

• Hard corals have a stone-like casing

• Soft corals are colorful

• Hard corals are larger

• Soft corals are found in deeper waters.

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