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21英语教师网 > 备课资源 > 拓展阅读 > 正文
How big can you grow these?
作者:21ST    来源:初中版第139期    日期: 2011-06-01
牛津版初一年级:Water Festival

关键词:Three forms of water, water festival, water games

话题归类:科普知识Popular science

煮东西的过程有时就象做科学实验。结果往往会吓你一跳!不信你也来试试。


BET you didn't know that you can grow your own crystals (晶体)!

Well, maybe not quite, but this experiment (实验) is pretty cool anyway.

What you need:

2 cups of sugar

3/4 cup of water

Paper cups

What to do:

1. Pour the water into a pan.

2. Ask your parents to help you heat the water until it boils (沸腾).

3. Add the sugar and stir (搅动) until you can't see it in the water.

4. Let it cool a little bit, then pour it into drinking glasses or paper cups.

5. Put the cups away for a few weeks and watch what happens.

As the water slowly disappears (消失), you will find some crystals made of sugar. The longer you let them sit, the bigger the crystals will grow.

Try it, and see how big you can make your crystals!



关键词:牛津版 初一 Water Festival 科普知识Popular science







 

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