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题型:阅读理解-单选 难度:0.65 引用次数:6 题号:22889723

Make your own rainbow (彩虹)

Learn how to make a rainbow with this fun science experiment (实验) for kids. Use just a few simple everyday things, and you can find out how rainbows work while enjoying a hands-on activity that’s perfect for kids. The experiment will help bring the exciting world of science to life.

What you’ll need

●A glass of water (about three quarters full)
●White paper
●A sunny day

Instructions

●Take the glass of water and paper to a part of the room with sunlight (better near a window).
●Hold the glass of water above the paper and watch as sunlight passes through the glass of water. The sunlight is refracted (折射) and forms a rainbow of colors on your piece of paper.
●Try holding the glass of water at different heights and angles to see what may happen.

What’s happening?

●While you usually see a rainbow in the sky, it can also appear in other situations (情况). You may have seen a rainbow in a water fountain (喷泉) or in the middle of a waterfall and you can even make your own in this experiment.
●Rainbows form in the sky when sunlight is refracted as it passes through raindrops: it acts in the same way when it passes through a glass of water. The sunlight is refracted, so we can see colors like red, orange, yellow, green, blue, indigo and violet.

1. What should we do to make a rainbow?
A.Start the experiment at late night.
B.Hold the glass of water at the same height.
C.Put the paper above the glass of water.
D.Put the paper under the glass of water.
2. According to “What’s happening?”, we can watch rainbows in ______ situations.
A.twoB.threeC.fourD.five
3. Which of the following is true?
A.You need a full glass of water in this experiment.
B.It’s better to do the experiment near a window.
C.If you do the experiment successfully, we can see 6 colors.
D.You need a piece of black paper to do the experiment.
【知识点】 科普知识 说明文

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