UNIT 4 Look into Science!
第四單元 走進科學！
Lesson 30: Keep the Candle Burning!
第30課 讓蠟燭燃燒！
THINK ABOUT IT!
想一想
Do you think science is interesting? Why or why not?
你覺得科學有趣嗎？為什么？
Name one or two famous Chinese scientists.
說出一到兩個著名的中國科學家。
What do you know about them?
關于他們你了解什么？
Science is so interesting!
科學是那么有趣！
I'm sure you'll like this experiment!
我確定你會喜歡這個實驗的！
What do you need?
你需要什么？
a candle ,a candleholder ,a big glass jar ,
一支蠟燭,一個燭臺,一個大玻璃杯,
a shallow dish with water ,matches
一只盛水的淺盤子,火柴
What do you do?
你要做什么？
1.Put the candle in the candleholder.
把蠟燭放在燭臺上。
2.Put the candleholder in the dish.
把燭臺放在盤子里。
3.Fill the dish half full of water.
在盤子里放一半水。
4.Light the candle.
點燃蠟燭。
To make a candle burn, you "light" it.
要使蠟燭燃燒，你得點燃它。
What do you use? A match.
你用了什么？一根火柴。
5.Let the candle burn for two or three minutes.
讓蠟燭燒兩到三分鐘。
6.Carefully put the jar over the candle until the top of the jar rests on the dish.
輕輕地將玻璃杯罩在蠟燭上，直到玻璃杯的頂部碰到盤子。
7.Look at the water in the jar.
看玻璃杯里的水。
What observation can you make?
你可以觀察到什么？
What is happening?
發生了什么？
As the candle burns, it uses up oxygen in the air.
蠟燭燃燒的時候，它消耗了空氣里所有的氧氣。
When the candle stops burning, it has used up all the oxygen in the air.
當蠟燭停止燃燒時，它燒完了空氣中所有的氧氣。
The water inside the jar then rises.
然后玻璃杯里的水就上升了。
How far did the water rise?
水會上升多高？
There is about one-fifth oxygen in the air,
空氣里大約有五分之一的氧氣，
so the water rises and fills about one-fifth of the jar.
所以水面上升，充滿大約五分之一的杯子。
Can you see the candleholder in this picture?
看到圖片中的燭臺了嗎？
The candle is pink. The candleholder is gray.
蠟燭是粉紅的。燭臺是灰色的。
The candleholder is "holding" the candle!
燭臺在“支撐”著蠟燭。
PROJECT .SCIENCE? NOW THAT'S INTERESTING!
任務. 科學？現在它很有趣！
Read about the experiments in this unit.
閱讀本單元的實驗。
What experiment would you like to do for your class?
你愿意為你的同學們做什么實驗？
With a group of classmates, practice your experiment.
和一組同學練習你的實驗。
Do it again and again. As you do it, describe it in English!
一次次地做實驗。在做實驗的時候，用英語描述。
Then, do your experiment for the class. Don't forget to:
然后，為你的同學們做實驗。不要忘了：
First, describe your experiment.
首先，描述你的實驗。
Second, ask the class to guess what will happen.
第二，讓你的同學們猜會發生什么。
Third, do the experiment. Describe the experiment as you do it.
第三，做實驗。在做的時候描述它。
Finally, ask the class what happens.
最后，問你的同學們會發生什么。