Question

5 вопросов.
заранее спасибо)

Answer 1

1) The atmosphere is a mixture of different gases.
2) Most of the gas in the atmosphere is within 30 km of the Earth`s surface.
3) At the top  of MOunt Everest there is only about one third as much air as at sea level.
4) Nitrogen and oxygen are the most abundant gases in the atmosphere.
5) Troposphere, Ozone layer, Stratosphere, Mesosphere.