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עמוד:34
Look at the key words from the article The Coral Reef- — An Endangered Ecosystem . Find these words in the article and predict what each paragraph is about . Look at the pictures appearing below the key words and read the captions to find out the difference between coral and coral reefs . Read the article The Coral Reef- — An Endangered Ecosystem and find out why coral reefs are considered endangered ecosystems . Key Words destruction disastrous effect ecosystems functions habitat threats Corals are made by small marine animals that build a hard skeleton ( bone ) made of calcium carbonate or limestone . After the animal dies , the hard skeleton remains . There are many different kinds of corals and they come in many shapes , sizes and colors .
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