Coral Reefs – Cities Under the Sea | ESL Worksheet Level C (Elementary)

Coral reefs are one of the most 美麗的 places in the ocean. They are full of 明亮的 colors like red, orange, yellow, and purple. Coral reefs look like underwater gardens, but they are actually made by tiny animals called coral polyps.

Coral polyps are very small creatures that live together in big groups. They build hard walls around their soft bodies using a special material. Over many years, these walls grow and cover large areas of the ocean floor. This is how a coral reef is made.

Many kinds of fish and sea animals call coral reefs their 家. Clownfish, sea turtles, and sharks all live near reefs. The reef gives them food and a safe place to hide from danger. Without reefs, many animals would have nowhere to live.

Coral reefs need clean, warm water to stay healthy. The water cannot be too hot or too cold. Coral also needs sunlight because tiny plant-like things live inside the coral and help it grow.

Today, coral reefs are in trouble. Dirty water and heat from the sun can hurt coral and make it turn white. We must keep the ocean clean to protect these amazing underwater cities.

📥 Download the Full Worksheet (PDF)

⬇️ Download Coral Reefs – Level C Worksheet (PDF)

A. Vocabulary

Match each word with its definition:

1. 美麗的
2. 明亮的
3. animals
4. small
5. build
6. cover
7. 家
8. food
9. healthy
10. clean

a. having many strong colors   b. very pleasing to look at   c. to make or create something   d. living things that eat and move   e. little in size   f. a place where someone lives   g. to spread over an area   h. in good condition, not sick   i. things we eat to live and grow   j. free from dirt or pollution

B. 對或錯

1. Coral reefs are full of bright colors.
2. Coral polyps are very large animals.
3. Coral polyps build hard walls around their bodies.
4. Only fish live near coral reefs.
5. Coral reefs give animals food and safety.
6. Coral needs clean water to stay healthy.
7. Coral does not need sunlight.
8. Dirty water can hurt coral.
9. Coral turns white when it is in trouble.

C. 填空

詞庫： beautiful, bright, small, build, home, healthy, clean

1. Coral reefs are one of the most _______________ places in the ocean.
2. Coral polyps are very _______________ creatures.
3. Coral polyps _______________ hard walls around their bodies.
4. Many sea animals call coral reefs their _______________.
5. We must keep the ocean _______________ to protect coral reefs.

D. 理解性問題

1. What are coral reefs made by?
2. How do coral polyps build a reef?
3. What animals live near coral reefs?
4. What does coral need to stay healthy?
5. Why are coral reefs in trouble today?

E. 討論問題

1. Would you like to visit a coral reef? Why or why not?
2. Why are coral reefs important for ocean animals?
3. What can people do to help protect coral reefs?

---

Source: National Geographic Kids | © Tahric Teaches