1. The atmosphere makes life possible on Earth.
Answers
Answer:
Earth's amazing gaseous atmosphere is responsible for making life possible on this, the third planet from the Sun. Our atmosphere contains water vapor which helps to moderate our daily temperatures. Our atmosphere contains 21% oxygen, which is necessary for us to breathe, 78% nitrogen.
The atmosphere blocks out harmful rays from the sun. The ozone layer, which lies in the stratosphere 11 to 50 kilometers from the Earth's surface, blocks out many harmful forms of radiation. Without the ozone layer, ultraviolet rays would destroy most life on Earth. Gases in the atmosphere also hold in heat. The Earth's average temperatures would fall below the freezing point of water without atmospheric gases to hold enough heat. The balance between blocked radiation and radiation allowed to reach the Earth makes life possible.
