1. Designing an experiment
Pendulum LAB
Designing an experiment

2. What is a pendulum?
“A body so suspended from a fixed point as to move to and fro by the action of gravity and acquired momentum.”

3. Brief History
1st-century seismometer device of Han Dynasty Chinese scientist Zhang Heng.
1583, Galileo uses timing of pendulum swing in astronomical measurements
1673, Huygens devised a practicable means of making a pendulum control the speed with which a clock mechanism runs. 
1851, Foucault demonstrated the rotation of the earth by suspending a pendulum that traced its path in sand on the floor. 

4. Excellent Example of transfer from pe to ke

5. Challenge…what variables change rate of swing (period)?
Discuss and list all variables in a basic pendulum
Identify CV IV and DV
Establish hypothesis for experimentation
Design a procedure to test hypothesis
Make a data table using IV/DV rules

6. Peer Review Process
“Peer-review is a critical part of the functioning of the scientific community, of quality control, and the self corrective nature of science.”
NOS (a way of knowing) Science distinguishes itself from other ways of knowing through use of empirical standards, logical arguments, and skeptical review.

7. What should it look like
Constructive – provide solutions to potential problems, don’t just point our flaws
Positive – not right or wrong, but a process towards accuracy
Receptive – It is there to help, so be open to changes in ideas and design

8. Directions Rotate whole group clockwise in the room
Discuss as whole group the following (5 minutes)
List of variable
Hypothesis
Procedure
Data table
Provide feedback (2 minutes)

9. Re-design
Take time to discuss and re-design the various elements of your lab design
What was helpful? New Ideas?
Lets get some data!!!