WebMar 31, 2024 · Air is all around us, but we can’t see it. So what is air, exactly? It’s a mixture of different gases. The air in Earth’s atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. … WebIn this lesson cluster, you have learned many things about air molecules. You have learned that air molecules are constantly moving and hitting things. You have learned that air molecules can be pushed closer together; that is, air can be compressed. Air molecules can also spread farther apart. When this happens, we say that the air expands.
Why are oxygen and hydrogen compressible, but water is …
WebJun 6, 2024 · Yet, in industrial applications water can be tremendously compressed and used to do things like cut through metal (especially if an abrasive material is added to the water and the water is hot). Water being pushed out at tremendous speed through a tiny hole is used in industry to cut through everything from metal to ceramics to plastics and ... WebThe atoms and molecules in gases are much more spread out than in solids or liquids. They vibrate and move freely at high speeds. A gas will fill any container, but if the container is not sealed, the gas will escape. Gas can be compressed much more easily than a liquid or solid. (Think about a diving tank – 600 L of gas is compressed into a ... bing homepage quiz 1999
Solids, liquids and gases — Science Learning Hub
WebThe higher the temperature, the faster the molecules are moving. As the air is heated, the molecules speed up, which means they push harder against their surroundings. If the … WebIn reality, air is a gas that takes up space and has mass (weight). Since there is a lot of “empty” space between air molecules, air can be … WebAug 31, 2024 · Compressing the air makes the molecules move more rapidly, which increases the temperature. This phenomenon is called “heat of compression”. ... If the pressure becomes too great or the compressed air is blown directly against the body, the compressed air can get underneath the skin and into the bloodstream. Can air be … bing homepage quiz 48