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What is the percentage of oxygen in the air?
21%
What is the percentage of nitrogen in the air?
78%
TRUE or FALSE? Plants don't need air to stay alive.
FALSE
TRUE or FALSE? Fire doesn't need air to burn.
FALSE
Wind is the _________ of air.
movement
TRUE or FALSE? Sound cannot travel through water.
FALSE
Three mediums that sound can travel through
gas, solid, liquid
TRUE or FALSE? Wind always moves from land to sea.
FALSE
2 gases in the air beside nitrogen and oxygen
carbon dioxide and water vapor
name 4 gases in the air
nitrogen, oxygen, carbon dioxide, water vapor
name 2 main gases in the air
nitrogen and oxygen
TRUE or FALSE? The hot air rises up.
TRUE
TRUE or FALSE? Wind turbines generate electricity from wind energy.
TRUE
Air is essential for ________ .
living things or burning
Sound cannot travel through _________.
space
TRUE or FALSE? Plants don't need air to stay alive.
FALSE
