Description
The air that surrounds the earth weighs an enormous amount, but you can’t even feel it unless the wind is blowing. You can’t see air or smell it, either. But we know it’s there, and we couldn’t live without it.
When it’s not windy, it can be easy to forget about air. But air is everywhere—it fills your house, your car, and even your empty milk glass. In fact, a regular room holds about 75 pounds of it!
