UNIT

11

Natural Science 1

The air is matter

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The air

Air is matter

Therefore

Space Mass

occupies has

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UNIT

11

Natural Science 1

The air is matter

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1 First we put a crumpled piece of paper inside a glass, then we push it to the bottom in such a way that it will not fall out when we turn the glass upside down.

Air occupies space

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UNIT

11

Natural Science 1

The air is matter

Home

2 Then we put the glass, upside down, into a container full of water.

Air occupies space

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UNIT

11

Natural Science 1

The air is matter

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3 When we take the glass out we can see that the paper is dry.

Why?

Because the glass was full of air, so the water

could not get in.

Therefore, air has volume; that is, it occupies a space.

Air occupies space

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UNIT

11

Natural Science 1

The air is matter

Home

And we can also prove that the oxygen tank of compressed air used by scuba divers is heavier when it is full of water

Air has mass

Then, if it is heavier this is

because it has a greater mass.

Therefore, air has mass and it weighs: air is matter.