The lowest level of the atmosphere is the _______________.

This layer of the atmosphere contains the ozone layer.

This layer of the atmosphere is where weather occurs.

Planes fly in the lower level of the ___________________.

The _______________ protects us from meteoroids, because in this layer they burn up.

The ________________ is very hot!

The _____________ is where satellites orbit the earth.

Atmo- in the word atmosphere means ___________.

The earth’s atmosphere is a__________ surrounding the earth, held in place by gravity.

The layers of the atmosphere are held in place by....

There are _____ layers of the atmosphere.

The first atmosphere is called?

The first atmosphere had no oxygen true or false?

Bacteria were the first living thing to make oxygen in the primitive atmosphere.

Which gas is the most in the present atmosphere?

Why does the stratosphere has two layers?

The second layer of the stratosphere is hot because?

Oxygen as a second abundant gas in the atmosphere

The ozone layer protects us and other living things from...