I have the coldest temperature of the atmosphere. Who am I?

I am the layer that interacts with the living things. Who am I?

I protect the Earth from meteors. Who am I?

Artificial satellites orbit the Earth here. Who am I?

I protect the Earth from the ultraviolet rays given off by the sun, who am I?

I am where radio waves are bounced back to the Earth’s Surface. Who am I?

I am the layer that touches the Earth’s Surface. Who am I?

I extend to an altitude from about 50-85km. Who am I?

I am the layer that reaches the highest altitude. Who am I?