Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

The atmosphere is very important for because:
1.It contains the we need to breathe.
2.It favours the of the Earth.
3.It protects us from the .