Air is all around us

An empty-looking cup

Look at a clean cup with nothing you can see inside. Is it really empty? It contains air. Air is a mixture of gases. Most of the time we cannot see it, but invisible does not mean missing. This cup is not a tiny room full of nothing.

Air takes up space

Air takes up room inside the cup and all around it. Our picture uses dots to stand for tiny particles of air. The real particles are much too small to see with your eyes. The dots are a model, not a drawing of dust.

Air can move

Ask an adult for a large sheet of paper. Gently move it like a fan, away from faces. You can feel a little breeze on your hand. The paper moves air. We do not need a storm to notice that air can move.

Look for a push

Put a small paper strip flat on a clear table. Gently fan it with your larger paper. Watch what happens. Keep both sheets away from eyes, heaters, and electrical fans. Moving air can push the strip. It does not need little invisible hands.

Pause and predict

Imagine gently fanning your hand with a sheet of paper. Pause and predict what you will feel. Will the moving air become a solid block, make a little breeze, or disappear because you cannot see it? Explain your idea before continuing.

Check your idea

You feel a little breeze. The moving paper pushes nearby air, and the air reaches your hand. You may see leaves or a paper strip move too. These effects are clues. Scientists use observations to learn about things they cannot see directly.

Air is a mixture

Here is a fun fact. Most of the air around us is nitrogen, not oxygen. Oxygen is another important part of the mixture. The picture shows a simplified mix of dry air. We breathe the mixture, not a cup of pure oxygen.

Your turn to observe

Tell someone two things about air. It takes up space, and it can move. With an adult, gently fan a paper strip and describe what you observe. Never cover your face with a bag or try a breathing challenge. Then continue to the worksheet.