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What are the two main gases?
Hydrogen and Nitrogen. Or oxygen and carbon dioxide, or carbon monoxide.
What two elements comprise 99 percent of the volume of the Earth's atmosphere?
Earth's atmosphere is roughly 78% Nitrogen & 21% Oxygen.
How much oxygen is present in air?
21% Oxygen, 78% Nitrogen, 1% other gasses in out atmosphere.
What 99 percent of the atmosphere is made up of either oxygen or .?
nitrogen
What makes up 20 percent of the earths atmosphere?
balls
What three gasses make up 99 percent of the atmosphere?
Nitrogen, oxygen, argon (4th carbon dioxide)
What gasses are the most plentiful in the atmosphere?
Nitrogen and oxygen.
Does the atmosphere contain 21 percent air?
No - out atmosphere is made up of approximately 78% Nitrogen, 21% Oxygen and 1% other gasses.
What are the two most common gasses that make up the atmosphere?
Nitrogen and oxygen.
What planet other than Venus has a nitrogen atmosphere?
Earth's atmosphere is about 79% nitrogen, 20% oxygen, and 1% "other gasses".
Which planet's atmosphere is 78 percent nitrogen?
The Earth has an atmosphere of 78% nitrogen (and 21% oxygen).
What are the 2 gases in the atmosphere?
74% nitrogen 21% oxygen 1% other gasses
What two most common gasses are found in the atmosphere layers?
The two most common gases found in Earth's atmosphere are nitrogen (N2) and oxygen (O2). Nitrogen makes up about 78% of the atmosphere, while oxygen makes up about 21%.
What are the two main gases?
Hydrogen and Nitrogen. Or oxygen and carbon dioxide, or carbon monoxide.
What two elements comprise 99 percent of the volume of the Earth's atmosphere?
Earth's atmosphere is roughly 78% Nitrogen & 21% Oxygen.
Are CO2 and Oxygen the only gasses on earth?
No, they're not. In fact, about 78% of the Earth's atmosphere is nitrogen.
What are the two most important gasses that make up the atmosphere?
78% Nitrogen,and 21% Oxygen
