What is Air Made of? (YT Vid)

What percentage of the air is made up of oxygen?

• About 99%

• About 50%

• About 78%

• About 21%

What gas makes up about 78% of the air?

• Oxygen

• Carbon Dioxide

• Argon

• Nitrogen

Where do 50% to 80% of all the oxygen on Earth come from?

• Cities

• Oceans

• Forests

• Mountains

Tags

NGSS.MS-LS1-6

What happens to the nitrogen we breathe in?

• We breathe it out unchanged.

• It is absorbed by the body.

• It is used in digestion.

• It is converted into oxygen.

What is the oxygen level at the peak of Mount Everest compared to the average?

• There is no oxygen

• About the same

• About 1/3 of the average

• Twice the average

What makes up the final 1% of the air?

• Pure oxygen

• Only carbon dioxide

• Only water vapor

• A mix of gases like argon, carbon dioxide, and others

How does the amount of water vapor in the air change?

• More indoors, less outdoors

• More on hot days, less on cold days

• The same throughout the year

• More in winter, less in summer

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-5

What contributes to the oxygen levels in the air?

• Plankton, tiny pieces of plant, algae, or bacteria

• Trees and forests only

• Volcanic eruptions

• Human activities

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Why might oxygen levels be higher near the ocean?

• More people live near the ocean

• Higher humidity levels

• The ocean produces a large amount of oxygen

• More trees are near the ocean

Tags

NGSS.MS-LS1-6

What else can be found in the air besides gases?

• Only dust and pollen

• Only water vapor

• Dust, pollen, microbes, spores, and scent particles

• Nothing else