文档介绍：It has no ______ or _______.
It has no _______ or _______.
We cannot ____ it, but we can ____ it.
Think plete
colour
shape
smell
taste
see
feel
It is __________.
It is important to all ______.
It is also important to ______ and _____.
We all need it to keep us _____.
everywhere
people
animals
plants
alive
Think plete
Look at the _____ and the ______.
Look at the _____ and the _____.
They all need it too.
It keeps them _____ in the sky.
kite
balloon
plane
bird
high
Think plete
What is it?
Does it have any colour or taste?
Can you see or feel it?
It is air.
No, it doesn’t.
I cannot see it, but I can feel it.
Why is it important?
We all need it to keep us alive.
What other things need air?
Kites, hot-air balloons, planes
and birds.
It uses hot air.
How does a balloon lift people up?
Ask and answer
How do kites and planes stay in the sky?
They ride on air.
Ask and answer
It keeps them high in the sky.