Does Air Exist?

Gloria Heard Carter School
5740 South Michigan
Chicago IL 60649
(312) 535-0860

Objective:

To get a better understanding of air and how it effects our daily lives.

Materials needed:

The folllowing materials are needed to complete these activities in a classroom
setting.

A. Balloons F. Medicine dropper
B. Plastic bottles G. Paper
C. Water H. Glass bottles
D. Boiled eggs I. Food coloring
E. Cottonballs J. Plungers (2)

Strategy:

1. Get students' attention by having them do breathing exercises inhaling and
exhaling three or four times.
2. Next, ask class how is this process related to air pressure?
3. Give a review of the basic concepts of air pressure; how it can be weighed,
take up space, and where and how it is found?
4. Take out two plastic bottles and ask class if the bottles contain air?
Demonstrate to the class that the bottle contains air by sucking or taking
most of the air out of the bottle. Students will compare the changes in the
two bottles.
5. Ask students whether the bottles can be brought to its original shape.
Do this by air back into the bottle.
6. Repeat this activity by using a balloon.
7. Divide students into groups of fours, go to assigned stations and demonstrate
the activities below.

Station 1:

Students will do this activity to test whether air is in something.

Materials needed:

8 ounce plastic tumblers; tissue; deep bowl filled with water.

Procedure:

1. Look at the glass. What is in it?
2. Crumple the tissue and put it in the bottom of the glass.
3. Turn the glass over, (be sure the tissue does not fall out) and push it
mouth first into into a deep bowl of water.
4. Now remove the glass without tipping it.
5. What happen to the tissue?
6. What can you say about this?

Station 2. Students will demonstrate and learn what air can do to an egg. Materials needed:

Hard boiled eggs, peeled; kitchen matches.

Procedure; 1. Stick two matches in the pointed end of an egg, hold the bottle up side down, light the matches and put the egg into the mouth of the bottle. Don't push! Keep the bottle upside down. 2. What happens? What can we say about this activity? Station 3. Students will learn how air can be compressed. Materials needed:

Clear plastic 16 ounce shampoo bottle filled with a small amount of water.

Procedure:

Observe the dropper floating in the bottle. Gently squeeze the
bottle, what happen? What can you say?

Station 4. How can air pressure make things stronger? Materials needed:

Paperstraws, raw potatoes.

Procedure:

1. Hold a straw near one end and try to stick the other end in the potato,
what happens?
2. Place your finger over the top of the straw and stick the other end
into the potato, what happens? Do it hard and fast, what happens? What
can you say about this?

Conclusion & Evaluation:

After completion of these activities students will be able to demonstrate
various concepts about air, although it's invisible, it really exists.




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