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1. 
What is the ozone layer?
A.
Is an invisible layer that protect the Earth of the sunrays
B.
A piece of rock in the ocean
C.
A cap inside the Earth
D.
A variety of planets
2. 
What is the origin of the ozone layer?
A.
300,000,000 B.C.
B.
600,000,000 B.C.
C.
When the Earth was created
3. 
Who discovered the ozone layer?
A.
Christian Schöenbein
B.
Andrei Houzeau
C.
Marie Alfred
4. 
How the UV light affects the Earth?
A.
It doesn't affects
B.
It cause an important damage
C.
It's very healthy for humans
D.
It's very healthy for humans
5. 
What of the following words is not a concequence of the destruction of the ozone layer?
A.
Pollution
B.
Global waming
C.
Inundations
D.
Gives more O2 to the amposphere