# AIR PRESSURE LAB EXPERIMENT I Suspend two sheets of

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```							                                              AIR PRESSURE LAB

EXPERIMENT I
Suspend two sheets of paper about 1”
apart by holding them between the pages of a
book or your fingers.

Blow a current of air through a
straw between the two sheets as
shown in the diagram.                                                                            BLOW

One of the partners will hold
the suspended paper while the other
blows air through the straw.

QUESTION
Answer before you begin with the experiment.       Answer after you complete the experiment.

What do you think will happen when you blow air             What actually happened when you blew air
through the straw into the space between the two            through the straw into the space between the two

a.   sheets of paper will be blown apart.                   a.   sheets of paper blew apart.
b.   sheets of paper will be together.                      b.   sheets of paper blew together.
c.   nothing will happen.                                   c.   nothing happened.
d.   other                           .                      d.   other                          .

EXPERIMENT II

Bend down the edges of a paper 8” x 5”
so that the paper rests about 1 1/2” above a table
top.
BLOW
Blow air underneath the paper
through a straw as shown in the diagram.

QUESTION

.Answer before you begin with the experiment.        Answer after you complete the experiment.
What do you think will happen when you blow          What actually happened when you blew air
air underneath the paper through the straw?          underneath the paper through the straw?
.
EXPERIMENT III

Cut your straw in half. Place half of the
straw in a clean 150 mL becker half filled with
water.

Hold the                                                                     BLOW
straw so that it does not touch
the bottom of the glass.

Hold the other half of the
straw in the position as shown
in the diagram.

Blow air through the straw
in the direction of the arrow across the top of the straw which is in the water.

QUESTION

Answer before you begin with the experiment.            Answer after you complete the experiment.

What do you think will happen when you blow             What happens to the level of the water in
air over the straw immersed in the water?               the straw inside the glass when you blow
air over the straw?

```
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