博客

Scientists have a new discovery about rain. When rain drops fall on a window, they get a small electric charge. This is like a tiny spark of energy. These special raindrops can be bad for metal things like bridges and cars. This process is called ‘corrosion’. It means the metal gets old and breaks. Scientists did a test on copper metal. They used a strong cover to protect it. However, the water with electricity still made small holes in the metal. This happens because the electricity in the water is quite strong. This discovery is very important for our world. Now, we need to find better ways to keep bridges safe. We also need to make better paint for cars. It is amazing that tiny drops of water can hurt big, strong buildings. Next time you see rain on your window, think about the tiny power inside it!

1. What happens when rain slides down a window?

• A.It becomes very cold.
• B.It gets an electric charge.
• C.It turns into copper.
• D.It makes the window break.

2. What is ‘corrosion’?

• A.When metal is destroyed.
• B.When rain falls from the sky.
• C.A way to paint a car.
• D.A type of big bridge.

3. What metal did the scientists use in their test?

• A.Gold
• B.Silver
• C.Copper
• D.Iron

4. Why did the copper get small holes?

• A.Because it was too old.
• B.Because the paint was bad.
• C.Because the water was very hot.
• D.Because of electricity in the water.

5. What do we need to make to protect cars now?

• A.Better paint
• B.Stronger windows
• C.Smaller bridges
• D.New raindrops