Summary
Find out which gases are safe for everyday use and which need special care.
Key Points
4 points1
Oxygen is essential for breathing and is not dangerous.
2
Carbon dioxide is a natural part of the air we exhale.
3
Some gases, like chlorine, can be harmful if inhaled.
4
Always follow safety rules when learning about chemicals.
New Words to Learn
3 wordschemical
a substance made of tiny parts that can change in reactions
inhaled
breathed in through the nose or mouth
safety
being careful to avoid danger
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