EVERYDAY SCIENCE

Detailed explanation-1: -Higher up, in the stratosphere, the ozone layer absorbs solar ultra-violet radiation and affects how much of the Sun’s heat is radiated back into space. The ozone layer shields us from the harmful effects of excessive UV radiation, which can lead to sunburn, skin cancer and eye damage.

Detailed explanation-2: -Earth’s atmosphere is roughly 78 percent nitrogen and 21 percent oxygen, with trace amounts of water, argon, carbon dioxide and other gases. No other planet in the solar system has an atmosphere loaded with free oxygen, which is vital to one of the other unique features of Earth: life.

Detailed explanation-3: -Not only does it contain the oxygen we need to live, but it also protects us from harmful ultraviolet solar radiation. It creates the pressure without which liquid water couldn’t exist on our planet’s surface. And it warms our planet and keeps temperatures habitable for our living Earth.

Detailed explanation-4: -Oxygen plays a critical role in respiration, the energy-producing chemistry that drives the metabolisms of most living things. We humans, along with many other creatures, need oxygen in the air we breathe to stay alive.

Detailed explanation-5: -The Atmosphere and Living Things Most of the atmosphere is nitrogen, which can be absorbed by soil bacteria to help plants grow. Carbon dioxide and oxygen gases in the atmosphere are also needed for life. Plants need carbon dioxide for photosynthesis. They use sunlight to change carbon dioxide and water into food.