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1. 
¿What consist of a mixture of gases that ara important for livings things?
A.
The ozone layer
B.
The atmosphere
C.
The Sun´s U.V rays
D.
The Earth
2. 
¿What occures when the planet´s temperature it regulate?
3. 
The____________protect the planet from the Sun´s U.V rays:
4. 
¿What cause the Sun´s U.V rays?
5. 
The atmosphere can be divided into_______(Letter) layers based on their_________and__________:
6. 
The Exosphere has___________and_______________:
7. 
The Troposphere has a large quantity of__________,________________,__________________and water_________:
8. 
The Stratosphere has almost no__________vapor, but a lot of_________:
9. 
The Mesosphere not contain_________or___________,but protect the planet like a "Layer shield" from space______________and giant_________:
10. 
The Thermosphere has another layer called the___________:
11. 
The Ionosphere allows the_________waves to be sent to the_________,it can also have atoms called__________: