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Q & A: Gases...Lots of Nothing

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Most recent answer: 10/22/2007
Q:
Can you tell about gases. What type of gases are there
- Lars van Dijk (age 9)
Acresfield Primary, Chester
A:
Gas is one of the 3 most common states of matter. What makes gas stand out from the other states of matter is the interaction between it's molecules.

Individual gas molecules spend most of their time alone. In other words, as they zip around they spend very little time bumping into other gas molecules. Solids and liquids are different because the molecules are more stuck together, which is why a given number of molecules in a solid or a liquid take up less room than the same number of gas molecules.

There are lots of different types of gases. The air we breath has about 78% nitrogen, 21% oxygen, and 1% other gases. Another gas you might know about is helium. When you see a balloon that raises up, it is full of helium. The reason it raises up is that helium is lighter than air.

Adam

(published on 10/22/2007)

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