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Q1) Ans) Nitrogen is the gas which has the more number of percentage: 78 percentage.
Q2) Ans) The chemical symbol of carbon dioxide is: CO2.
Q3) Ans) The second highest gas is oxygen. It's chemical symbol is: O.
Q4) Ans) Nitrogen can also be produced on a large scale by burning carbon or hydrocarbons in air and separating the resulting carbon dioxide and water from the residual nitrogen. On a small scale, pure nitrogen is made by heating barium azide, Ba(N3)2
Q5) Ans) 2.2 The Minor (Trace) Constituents of the Atmosphere. The remaining 0.1% of the atmosphere consists of the trace constituents. These include water vapor, carbon dioxide, ozone, methane, various oxides of nitrogen, neon, and helium. They are called trace gases because they exist in small amounts.
Q6) Ans) Humans get the oxygen they need by breathing through their nose and mouth into their lungs. Oxygen gives our cells the ability to break down food in order to get the energy we need to survive.
Q7) Ans) Carbon dioxide plays an important part in vital plant and animal process, such as photosynthesis and respiration. ... Green plants convert carbon dioxide and water into food compounds, such as glucose, and oxygen. This process is called photosynthesis.
Q8) Ans) Oxygen isn't just in our atmosphere. It also plays a large part in the Earth's crust. And with more oxygen the crust would be heavier, making the lithosphere heavier than our atmosphere. This would cause things to oxidize, including large bodies of water, turning into hydrogen peroxide.