Question

The air we breathe is mostly a mixture of oxygen and hydrogen. How do air molecules change above 100 km?

Gases are no longer evenly mixed but layered.

The electrically charged ions in the ionosphere creates turbulence.

Water vapor condenses from the cold air.

Meteors burn in Earth's atmosphere.

Answer 1

Step-by-step explanation:

Gasses are no longer evenly mixed but

Answer 2

The answer is a

Step-by-step explanation:

The atmosphere be fits itself with light gases and therefore the gases no longer evenly mix .