Summary
The quiz helps identify which gases are harmless and which require caution.
Key Points
5 points1
Oxygen supports life and is non‑reactive at normal temperatures.
2
Carbon dioxide is a greenhouse gas produced by breathing and combustion.
3
Chlorine gas can irritate lungs and must be used with protection.
4
Hydrogen is very flammable and can explode if ignited.
5
Knowing properties helps keep experiments safe.
New Words to Learn
4 wordsgreenhouse gas
a gas that traps heat in the atmosphere, like carbon dioxide
flammable
easily catches fire
explosion
a sudden, violent release of energy
property
a characteristic or feature of something
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