🎧 Listen to today’s story
📚 Key Words
| Word | Meaning | 中文 |
|---|---|---|
| planet | A large round object in space that moves around a star. | 行星 |
| pole | One of the coldest areas at the very top or bottom of the Earth. | 极地 |
| rock | The hard, natural substance that forms the Earth. | 岩石 |
| cool | To become less hot. | 变凉 |
| human | A person, not an animal or a plant. | 人类 |
| scientist | A person who studies science to learn new things about the world. | 科学家 |
| protect | To keep someone or something safe from danger. | 保护 |
| history | The study of things that happened in the past. | 历史 |
📖 Read the story
Did you know that our planet Earth was very different in the past? Today, we have cold ice at the north and south poles. But a long time ago, there was no ice at all. Billions of years ago, the Earth was a hot ball of melted rock. It was too hot for any living things. There were no green plants, blue oceans, or animals. Slowly, our planet cooled down. Water appeared, and life began to grow. Today, humans are making the Earth warm again. This is called climate change. Scientists are studying the past to understand how the weather is changing now. Learning about Earth’s history helps us protect our beautiful home today. Would you like to travel back in time to see the young, hot Earth?
✏️ Answer the questions
1. What was the Earth like billions of years ago?
- A.It was very cold.
- B.It was a hot ball of rock.
- C.It was covered in green plants.
- D.It had many large oceans.
2. Why were there no animals on early Earth?
- A.There was too much ice.
- B.It was too dark.
- C.It was too hot.
- D.There was no rock.
3. What happened after the Earth slowly cooled down?
- A.Water appeared and life grew.
- B.All the water disappeared.
- C.The Earth became a star.
- D.It became too cold to live.
4. What are humans doing to the Earth today?
- A.Making it much colder.
- B.Making it warm again.
- C.Putting more ice at the poles.
- D.Stopping all the weather.
5. Why do scientists study Earth’s history?
- A.To find hidden gold.
- B.To travel to other planets.
- C.To help protect our planet today.
- D.To make the Earth hotter.