Atmosphere- By Leslie Lopez

1. The atmosphere has 4 layers. troposphere, stratosphere, mesosphere and thermosphere .

#2- The atmosphere is important because it blocks some of the sun's dangerous rays, the atmosphere also traps heat to keeps us warm.

#3- Two gases make up earths atmosphere, nitrogen makes up 78% of the atmosphere, and oxygen is 21% of the earths atmosphere, the 1% that's left is other gases.

#4- The earth's atmosphere extends 10,000 km from the earth's surface.

#5- The troposphere contains most of the air and oxygen in the atmosphere and our weather is formed in troposphere.

#6- As you rise up into the atmosphere the air pressure decreases.

#7- About 20 % of the Earth's population breathes severely contaminated air.

#8- The frequency of skin cancers is increased by the thinning of the ozone layer.

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