🎧 Listen to today’s story
📚 Key Words
| Word | Meaning | 中文 |
|---|---|---|
| clock | An instrument used for measuring and showing time. | 钟表 |
| battery | An object that provides electricity for things like toys or clocks. | 电池 |
| atom | A very small bit of matter that everything is made of. | 原子 |
| nucleus | The center part of an atom. | 原子核 |
| metal | A hard, usually shiny substance like gold or iron. | 金属 |
| precise | Very accurate and exact. | 精确的 |
| universe | Everything that exists, including all stars and planets. | 宇宙 |
| secret | Something that is not known by many people. | 秘密 |
📖 Read the story
Most clocks use batteries or weights to tell time. But now, scientists have a special new clock. It is called a nuclear clock. This clock is very different. It uses a tiny part of an atom to work. Everything in the world is made of atoms. In the middle of every atom, there is a nucleus. It is like a tiny heart. Scientists used a special metal called thorium to build this clock. The nuclear clock is very precise. This means it is very exact. It does not make mistakes. Scientists want to use these clocks to study space. They hope to find secret things like dark matter. This is an amazing invention. In the future, these will be the best clocks in the world. They will help us understand our universe better. Imagine having a clock that is never wrong!
✏️ Answer the questions
1. What do scientists use to make the new clock work?
- A.Large batteries
- B.A tiny part of an atom
- C.Heavy weights
- D.Running water
2. What is an atom?
- A.A small part of everything
- B.A type of clock
- C.A metal heart
- D.A scientist
3. What does the word ‘precise’ mean?
- A.Very slow
- B.Very expensive
- C.Very exact
- D.Very beautiful
4. Where do scientists want to use nuclear clocks?
- A.In schools
- B.In kitchens
- C.In space
- D.In cars
5. What is the middle of an atom called?
- A.A battery
- B.A nucleus
- C.A thorium
- D.A universe