Air
ICSE · Class 4 · Science
Complete topic list for Air in ICSE Class 4 Science. Key concepts, sub-topics, and what to focus on for board exams.
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Topics in Air
Matter and States of Matter
- Matter is anything that has mass and takes up space.
- There are three states of matter: solid, liquid, and gas.
- Air is a gas and has no definite shape or volume.
Properties of Air
- Air occupies space — shown by the glass-and-water experiment.
- Air has weight — proven by balancing inflated and deflated balloons on a scale.
- Air expands on heating — hot air rises and fills balloons.
Composition of Air
- Air is a mixture of gases: mainly nitrogen (78%), oxygen (21%), and carbon dioxide (0.04%).
- Air also contains water vapour, dust particles, smoke, and germs.
- Oxygen is essential for breathing and burning.
Uses of Air
- Living things need oxygen in air to breathe.
- Air helps in burning — things burn in presence of oxygen.
- Air is used to fill tyres, balloons, and footballs.
Key Concepts
Central concept: Air
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