Identification: Write your correct answer of what is being referred to the given statements.
1._________ covering Earth with a thick blanket of gas.
2._________ layer of Earth atmosphere with 75 % contains of the gases. 3._________ part of the Earth's atmosphere that keeps most of the sun’s ultraviolet radiation from reaching Earth's surface.
4.________ part of the thermosphere Earth layer with electrically charged particles. 5.________ layer of Earth's atmosphere 50 km from the surface of Earth.