AIR PRESSURE LAB EXPERIMENT I Suspend two sheets of

							                                              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
sheets of papers? Circle your answer.                       sheets of papers? Circle your answer.

  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?