Multiple choice

Atmosphere is the layer of

  1. sands

  2. gases

  3. particles

  4. None of the above

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The atmosphere is a layer of gases surrounding Earth, primarily nitrogen (78%) and oxygen (21%). These gases protect life by absorbing ultraviolet radiation and regulating temperature through the greenhouse effect. Solids and liquids are not the primary components.