[KET] 🐾 Explainer: What are corals?

Explainer: What are corals?

🎧 Listen to today’s story

📚 Key Words

Word Meaning 中文
actually Used to say what is real or true. 实际上
reef A long line of coral or rocks in the sea. 礁,珊瑚礁
famous Known by many people. 著名的
tiny Very small. 极小的
tentacles Long, thin parts of some sea animals used to catch food. 触手
algae Very simple plants that grow in water. 藻类
share To give some of what you have to someone else. 分享
safe Not in danger of being hurt or lost. 安全的

📖 Read the story

Many people think corals are plants, but they are actually small sea animals. They live in large groups and build beautiful underwater homes called reefs. The most famous one is the Great Barrier Reef in Australia. Corals have tiny arms called tentacles. At night, they use these arms to catch food. They also live together with very small plants called algae. These plants make food from sunlight and share it with the corals. In return, the corals give them a safe place to live. Coral reefs are very important because many different fish live there. They are like busy cities under the sea. Next time you see a picture of a colorful coral reef, remember that it is a home for millions of active sea animals!

✏️ Answer the questions

1. What are corals?

  • A.They are a kind of plant.
  • B.They are small sea animals.
  • C.They are colorful rocks.
  • D.They are fast fish.

2. Where can you find the most famous coral reef?

  • A.In Australia
  • B.In America
  • C.In Africa
  • D.In Asia

3. When do corals catch food with their arms?

  • A.In the morning
  • B.In the afternoon
  • C.At night
  • D.At lunchtime

4. How do the small plants (algae) help the corals?

  • A.They make the water warm.
  • B.They build the reef.
  • C.They protect the corals from big fish.
  • D.They share food made from sunlight.

5. Why are coral reefs compared to busy cities?

  • A.Because people build houses on them.
  • B.Because many different fish live there.
  • C.Because they have a lot of cars.
  • D.Because they are very noisy.