Where’s the Air?
This lesson developed by Reach Out!
Recommended Age Groups: Early Elementary, Later Elementary
Guiding Questions:
- What is air?
- How can I tell that air even exists?
Objectives
Concepts:
- Air is the mix of gases that surround our Earth.
Principles:
- Air is invisible, odorless, and tasteless.
- Air is constantly in motion or moving. It interacts with everything
in our atmosphere and our Earth.
Facts:
- Air is critical for our very existence! We breathe air and it is part
of our blood. Without air, we will die.
- Air takes up space.
Skills
- Making Observations
- Making Comparisons
- Documenting Findings
- Communicating Findings
Materials:
Each person needs:
- A clear drinking `glass
- A wide-mouth glass gallon container or a big beaker
- Piece of paper
- Water
Room Preparation
Need ample elbow room. Spills may happen.
Safety Precautions
None
Procedures and Activity
Introduction
Begin by asking, “What is air?”
Share ideas and experiences with “air.” Come up with some
points such as: we can't see, taste, or smell air. Air is all around us.
We need air to live.
Ask, “Does air take up space?”
Hold your hands away from each other. Slowly push them together. Can we
feel air in between our hands? Do you feel air being pushed aside as
your hands come together?
Can you see air in front and all around you? How do know it is there
and takes up any space?
Today we will do an experiment to help us understand air is present and
takes up space.
Activity

- Fill a gallon container or big beaker about 3/4 full of water.
- Crumple up a piece of paper, large enough to stay scrunched into
your glass.
- Pat the crumpled-up piece of paper into the bottom of the glass.
- Turn the glass upside down. Very carefully, lower it into the big
container of water. Don’t let it slant sideways.
- Carefully observe what is happening inside the small cup. Is water
sneaking into the cup? Why or why not? Is the crumpled paper getting
all wet? Why or why not?
- Carefully lift the glass up and out of the container of water. Take
out the crumpled piece of paper. Is it dry or wet? What happened?
Closing - Original Question
Ask again,
- What is air?
- How can I tell that air even exists?
Evaluation
Share ideas about what happened during the experiment. Listen for
evidence that they came to understand that there is air in the glass,
whether it is sitting upright on a table or being sunk upside down
in the container of water. Proof that air exists is how the piece of
crumpled-up paper didn’t even get wet while the cup was underneath
water. Air takes up space, even though we can’t see it with our
eyes. Water could not get up into the glass, because the glass had air
in it.
Extension Ideas
Identify some other topics or questions related to the presence of air
and air pressure. Research and share what you find out! Some ideas are:
how submarines maintain air for passengers to breathe, how scuba gear works
for divers, air and oxygen systems in airplanes, how our lungs work, and
learning about life-saving respirators.
Careers Related to Lesson Topic
Prerequisite Vocabulary
- Air
- The mix of gases in our atmosphere. Air is tasteless, odorless, and
invisible.
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