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Cities in the sea
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What is the main purpose of the article?
The main purpose of the article is to explain why coral reefs are important.
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If something attracts people, it has features that cause people to ______________.
come to it
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What are polyps?
Polyps are tiny organisms that form the structure of coral reefs.
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How coral reefs help protect coasts?
Coral reefs help protect coasts by slowing down waves.
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What does the author say about the chemicals from reef creatures?
They help scientists create new medicines.
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When you damage an object, you _______________ it.
break or destroy
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When you warn someone about something, you tell them that something _______ may happen.
bad
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If something remains, it _______________.
continues to exist
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Things that are threatening the health of coral reefs are . . .
1). People catch too many reef fish and often damage the reefs. 2). Polluted water as a certain type of algae grows in dirty water. 3). Global warming
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Things that are popular are enjoyed by _______ people.
many
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A lake which is shallow is _____________ .
not deep
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What does the helpful type of algae give corals?
The helpful type of algae gives corals their color.
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