Which gases is placed second in respect of abundance in the Earth's atmosphere
Which one of the following gases is placed second in respect of abundance in the Earth's atmosphere?
- Oxygen
- Hydrogen
- Nitrogen
- Carbon dioxide
Answer
Earth is the only planet in the solar system with an atmosphere that can sustain life. Earth's atmosphere is divided into five main layers: the exosphere, the thermosphere, the mesosphere, the stratosphere and the troposphere.
The Earth's atmosphere contains 78% Nitrogen, 21% Oxygen, 0.9% argon, 0.04% Carbon dioxide and remaining trace amounts of neon, helium, methane, krypton and hydrogen, as well as water vapor.
The correct option is A.