Composition of the atmosphere

Which gas is the most abundant in dry air?

• Oxygen

• Nitrogen

• Argon

• Carbon dioxide

What is the approximate percentage of oxygen in dry air?

• 0.04%

• 0.06%

• 21%

• 78%

Which gas makes up 0.9% of dry air?

• Oxygen

• Nitrogen

• Argon

• Carbon dioxide

What is the percentage of carbon dioxide in dry air?

• 0.04%

• 0.06%

• 0.9%

• 21%

Which of the following gases is present in the smallest amount in dry air?

• Oxygen

• Nitrogen

• Argon

• Carbon dioxide

What gas makes up most of the atmosphere?

• Nitrogen

• Oxygen

• Argon

What percentage of the atmosphere is oxygen?

• 21%

• 16%

• 33%

What percentage of the atmosphere is carbon dioxide?

• 5%

• 1%

• 0.04%

What is the formula of nitrogen?

• 2N

• N₂

• N²

How much water is in the air?

• It varies depending on the weather

• 1%

• 5%