Air is the mixture of gases that we breathe. The main parts of air are nitrogen, oxygen, carbon dioxide, and a little bit of other gases. Nitrogen makes up most of the air we breathe, and oxygen is very important because we need it to live.
Example: When you take a deep breath, you are inhaling oxygen from the air which helps your body to work properly.
Fun Fact: Plants use carbon dioxide from the air to make food and give us oxygen in return!
Multiple Choice Questions:
1. What gas do we breathe in that helps us live?
a) Nitrogen
b) Oxygen
c) Helium
d) Carbon Dioxide
Answer: b) Oxygen
Explanation: We breathe in oxygen which we need to live and stay healthy.
2. What is the most common gas in the air?
a) Oxygen
b) Nitrogen
c) Carbon Dioxide
d) Argon
Answer: b) Nitrogen
Explanation: Nitrogen makes up most of the air, more than 70% of it!
3. Which gas do plants need to make their food?
a) Oxygen
b) Carbon Dioxide
c) Nitrogen
d) Methane
Answer: b) Carbon Dioxide
Explanation: Plants use carbon dioxide from the air to make food and give us oxygen.
4. What happens when we go up, like on a mountain?
a) There is more air
b) There is less air
c) The air is warmer
d) The air smells really good
Answer: b) There is less air
Explanation: As you go up a mountain, there is less air, which means it can be harder to breathe.
5. What can happen if we don't have enough oxygen?
a) We feel happy
b) We sleep longer
c) We might feel tired or sick
d) We can run faster
Answer: c) We might feel tired or sick
Explanation: Without enough oxygen, our bodies can feel weak, tired, or even sick because we need oxygen to be strong.
