The Effects of Air Pressure

1
The Effects of Air Pressure

• Can Crush LAB

2
Problem

• What will happen when a can with 15 ml of boiling
  water is turned upside down and dunked into a
  bowl of ice water?

3
Hypothesis

• If a can containing 15 ml of boiling water is
  quickly turned upside down into a bowl of ice
  water, then the air molecules will (move faster,
  farther apart, become less dense and rise to the
  top of the can OR move slower, closer together,
  become more dense and fall to the bottom of the
  can), AND (the can will blow up OR the sides of
  the can will crush in) because the air pressure
  outside the can is (less OR greater) than the air
  pressure inside the can.

4
Materials

• Get from your lab handout.

5
Procedure

• Get from your lab handout.

6
Experimental Design
Control Group

• The open can as it is heating up on the hot
  plate, because there is equal pressure inside and
  out as steam is allowed to escape.

Experimental group

• The can that is dunked into ice water

Independent Variable
the temperature
Dependent Variable
the pressure and reaction in the can
7
Data

• Draw a picture of the can before and after it has
  been dunked into the ice water.
• BEFORE AFTER

8
Summary and Conclusion

• Summary Write what happened
• Conclusion
• Was your original problem answered?
• Did the data support your hypothesis? Why / Why
  not?
• Then Answer the questions on your lab report
  sheet and staple it into your log book.