Define the term atmosphere'. Write down the usefulness of the atmosphere.
Answers
An atmosphere is a layer or a set of layers of gases surrounding a planet. An atmosphere is more likely to be retained if the gravity it is subject to is high and the temperature of the atmosphere is low.
The atmosphere can be divided into layers based on its temperature. These layers are the troposphere, the stratosphere, the mesosphere and the thermosphere. A further region, beginning about 500 km above the Earth's surface, is called the exosphere.
Usefulness
The atmosphere is an important part of what makes Earth livable. It blocks some of the Sun's dangerous rays from reaching Earth. It traps heat, making Earth a comfortable temperature. And the oxygen within our atmosphere is essential for life.
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Our earth is surrounded by a blanket of air and gases known as atmosphere.
usefulness: It protects us from harmful uv rays of sun
Without oxygen in atmosphere, Earth would have been a life less planet
Etc.....
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