2 gases in the air beside nitrogen and oxygen
carbon dioxide and water vapor
What is the percentage of nitrogen in the air?
78%
TRUE or FALSE? Wind turbines generate electricity from wind energy.
TRUE
Sound cannot travel through _________.
space
TRUE or FALSE? Plants don't need air to stay alive.
FALSE
TRUE or FALSE? Fire doesn't need air to burn.
FALSE
Vibrating objects make ..........
sound
Name 2 things need air to stay alive
a tree, a dog, a cat, a baby, the fire...
TRUE or FALSE? Wind always moves from land to sea.
FALSE
name 4 gases in the air
nitrogen, oxygen, carbon dioxide, water vapor
TRUE or FALSE? Sound cannot travel through water.
FALSE
TRUE or FALSE? The hot air rises up.
TRUE
name 2 main gases in the air
nitrogen and oxygen
Wind is the _________ of air.
movement
TRUE or FALSE? 1% of air is carbon dioxide
FALSE
Air movement causes ..........
wind
Human and animals need air to ........
breathe
Sound can travel through.............
liquid
TRUE or FALSE? Music can travel through the air.
TRUE
Three mediums that sound can travel through
gas, solid, liquid
What is the percentage of oxygen in the air?
21%
TRUE or FALSE? Plants don't need air to stay alive.
FALSE
Air is essential for ________ .
living things or burning
Name 2 things that can make sound
horn, bell, piano, guitar, speaker, a human, an animal...