ENDLESS: What is air?

What is air?

Type your name here.

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Select Earth's atmosphere.

Air is the invisible mixture of gases that make up Earth's atmosphere.

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Select any of the models that respresent the different air molecules.

Select the model that represents a nitrogen gas molecule.Each nitrogen molecule is made from two nitrogen atoms bonded together.

Select the model that represents an oxygen gas molecule.Each oxygen gas molecule is made from two oxygen atoms bonded together.

Select the model that represents a carbon dioxide gas molecule.Each carbon dioxide gas molecule is made from one carbon atom and two oxygen atoms bonded together.

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Which gas makes up about 80% of Earth's atmosphere?

Nitrogen (N2)

Carbon Dioxide (CO2)

Oxygen (O2)

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Yes! Nitrogen Gas (N2) makes up about 80% of Earth's atmosphere.Select one of the nitrogen gas molecules.

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Which gas in the air do our lungs absorb when we breathe in?

Nitrogen (N2)

Carbon Dioxide (CO2)

Oxygen (O2)

Yes! All animals need to breathe in oxygen gas (O2) to live.Oxygen gas makes up about 20% of the atmosphere.

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Select one of the oxygen gas molecules.

The atmosphere also contains a very tiny percentage of other gases, such as methane, water vapor, and carbon dioxide.

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Select the carbon dioxide (CO2) molecule.

Ooh ooh! Studying the composition of the atmosphere (air) is a perfect time to use a pie chart!

Try this activity another way!

Pie charts are useful when comparing parts of a whole.

The Composition of Air

Argon Gas (Ar) 0.93%

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Nitrogen Gas (N2) 78.09%

0.03% Other Gases to include Carbon Dioxide (CO2) and Methane (CH4)

Oxygen Gas (O2) 20.95%

Well done! Select here.

Drag the labels so they correctly show the composition of air on the pie chart. When the labels are correctly placed, a message will appear.

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Wonderful work learning about the gas molecules that make up our air! If your teacher requests, screenshot this page for credit.

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Select the label that corresponds to the most abundant gas in air.

The Composition of Air

Argon Gas (Ar) 0.93%

Ar

Nitrogen Gas (N2) 78.09%

0.03% Other Gases to include Carbon Dioxide (CO2) and Methane (CH4)

Oxygen Gas (O2) 20.95%

Select the label that corresponds to the most second most abundant gas in air.

The Composition of Air

Argon Gas (Ar) 0.93%

Ar

Nitrogen Gas (N2) 78.09%

0.03% Other Gases to include Carbon Dioxide (CO2) and Methane (CH4)

Oxygen Gas (O2) 20.95%

Select the label that corresponds to the most third most abundant gas in air. Note: This gas makes up less than 1% of air!

The Composition of Air

Argon Gas (Ar) 0.93%

Ar

Nitrogen Gas (N2) 78.09%

Oxygen Gas (O2) 20.95%

0.03% Other Gases to include Carbon Dioxide (CO2) and Methane (CH4)

Finally, select the label that corresponds to rest of gases that together make up an extremely tiny (but still important) portion of air.

The Composition of Air

Nitrogen Gas (N2) 78.09%

Oxygen Gas (O2) 20.95%

0.03% Other Gases to include Carbon Dioxide (CO2) and Methane (CH4)

Argon Gas (Ar) 0.93%

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Nicely done!You've completed the pie chart.

The Composition of Air

Nitrogen Gas (N2) 78.09%

Oxygen Gas (O2) 20.95%

Argon Gas (Ar) 0.93%

Ar

0.03% Other Gases to include Carbon Dioxide (CO2) and Methane (CH4)

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