Question

1* What is atmosphere?

2*What is the composition of atmosphere?

3*Which gas is known as the life giving gas?

4*Which gas helps in burning?​

Answer 1

1. An atmosphere is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body. 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.
2. The atmosphere is composed of a mix of several different gases in differing amounts. The permanent gases whose percentages do not change from day to day are nitrogen, oxygen and argon. Nitrogen accounts for 78% of the atmosphere, oxygen 21% and argon 0.9%.
3. Carbon dioxideCarbon dioxide is a life-giving gas.
4. OxygenOxygen is required for burning or combustion to take place.

Answer 2

1. An atmosphere is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body.
2. Air consist of many gases such as Oxygen,nitrogen, carbon dioxide etc.. they are proportional to each other.
3. Oxygen
4. Co2