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What is in air?
Oxygen, Nitrogen, Carbon Dioxide and other gasses
How much percent of air is oxygen?
21%
How much percent of air is Nitrogen?
78%
How much percent of air is Carbon Dioxide?
1%
Which is the only gas that we can breathe in?
Oxygen
What is the layer of air around the Earth called?
Atmosphere
What does the atmosphere do?
It maintains the Earths temperature. It protects the it from flying objects. Protects us from the Suns UV rays.
Which direction does hot air move?
Up
What is wind?
Wind is moving air?
What causes wind?
A difference in temperatures.
What gas do plants need?
Carbon Dioxide
Why do plants need air?
To make their own food.
Does air have mass?
Yes
How can wind be useful?
It can dry our clothes, cool us off, fly our kites, move our boats.
How can wind be a nuisance?
It can blow us away, blow our things away, make us cold, cause tornados.
Does air have a shape?
No
