Gases Around Us

Looking Around 2 — About Me / Water. Breathing air and empty space ideas link to About Me and Water chapters in Looking Around 2.

• Air is a mixture of gases we breathe.
• Gases have no fixed shape or size — spread out.
• We cannot see air but we can feel it.

Verbal: Air is a gas we breathe. Gases spread out and fill space — you cannot see air but feel wind.

Symbolic: Empty bottle → full of air. Balloon + breath → gas inside pushes rubber outward.

Level 1 — Air is everywhere

Empty bottle isn't empty — full of air.

Level 1 — Properties

Spread to fill space; can be compressed (balloon pump).

Level 1 — Useful gases (intro)

Oxygen for breathing; balloon filled with air/helium.

Level 2 — Wind = moving air

Fan moves air — you feel it on face.

Level 2 — India

Pranayama breathing; tyre filled with air on bicycle.

Why does a balloon get bigger when you blow into it?

Step 1 — Your breath is **air** (gas).
Step 2 — Gas goes inside balloon.
Step 3 — Gas spreads and pushes rubber outward.
Answer: Air fills and expands the balloon.

• Is there air inside a closed jar?
• What do we breathe in?
• Balloon or stone — which has air inside?

Stretch: Why does a bicycle tyre look flat when air leaks out? Is smoke only a gas?

Revision tip: Blow up a balloon and tie it — poke gently and feel the gas press back (compress and expand).

Open the Practice tab for graded questions on Gases Around Us.