Experiments for Children 讨论
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Question 1
正确答案：
20 balloons|20 BALLOONS
Mind you, you only need twenty balloons and a table - you don't need any special engines or anything like that!
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Question 2
正确答案：
units of measurement/measurements/measurement units|units of measurement|measurements|measurement units|UNITS OF MEASUREMENT|MEASUREMENTS|MEASUREMENT UNITS
It's supposed to demonstrate the importance of having fixed units of measurement.
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Question 3
正确答案：
rock salt/salt|rock salt|salt|ROCK SALT|SALT
OK, now for number three you need rock salt or copper sulphate.
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Question 4
正确答案：
crystals|CRYSTALS
Um, and basically you dissolve lots of salt into the water and watch the crystals form, so it basically teaches the kids about growing crystals.
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Question 5
正确答案：
string/piece of string|string|piece of string|STRING|PIECE OF STRING
It looks like you get some cardboard and draw a circle on it, divide it into six equal segments and colour each one in using different colours, then you thread a piece of string through the middle.
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Question 6
正确答案：
(ordinary) (white) light|ordinary white light|light|white light|ordinary light|ORDINARY WHITE LIGHT|LIGHT|ORDINARY LIGHT|WHITE LIGHT
It teaches them about how white light or ordinary light is made up.
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Question 7
正确答案：
h
Yes, that's true, but don't you think it's a bit risky to get a group of eight - year - olds pushing each other around a classroom like that?
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Question 8
正确答案：
b
I think it needs to be something a bit more active and interesting than that, don't you?
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Question 9
正确答案：
e
But don't you think it's a bit ambitious for this age group?
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Question 10
正确答案：
c