Law of Reflection Proof Lab

Experimental Design

ObjectiveUsing the Scientific Method, design an experiment that will prove the Law of Reflection.

Problem How can the Law of Reflection be proved to be true?

Research Define the Law of Reflection

Hypothesis Write a hypothesis that answers the problem.

Materials Make a list of the materials you will use for the experiment.

Procedures

Make a list that will describe how the experiment will be done. You must include at least 4 angles, one of which should be a 90o angle.

Also include the following:1. The Manipulated Variable that

will be in the experiment2. The Responding Variable3. A list of what you will control or

keep constant.4. A drawing of your set-up design

Observations Make a data table that will keep track of you data

Conclusion

1. Was your hypothesis supported or not by the data? Justify your response.

2. If you observed differences in the angle of incidences and angle of reflections comparisons, what might explain the differences?

Law of Reflection Proof Lab

Experimental Design

Demonstrate the use of the rubber band, ramp, marble, and angle paper to facilitate imitative and observational learning. (monkey see, monkey do)

This also activates the “anticipatory set” while building background knowledge.

The paper lists the six steps of the scientific method.Scientific Method1. The Problem or Posing Question2. Research3. Hypothesis4. Experimental Design5. Collet Data / data table6. Analysis and conclusion

What is the law of reflection?

Correctly replace parts of the law of reflection with the following two phrases:

The marble’s hitting angle

The marble’s bouncing angle

What will the experimenter be changing in this experiment?

What part of an experiment is the above called?

What responds to the manipulate variable in this experiment?

What part of an experiment is the above called?

If a marble rolls straight into the rubber band with no angle, in what direction do you think it will reflect off the rubber band?

A control in an experiment is used for comparison. Could a marble rolled at an angle of zero degrees be used as a control?

Is this experiment testing the effects of the speed or the effects of the angle at which the marble hits the rubber band?

Should the speed at which the marble hits the rubber band be controlled in this experiment?

What are controlled variables?

What is used to measure the hitting angles and bouncing angles?Which angle is the incident angle and which is the angle of reflection?

1. Place the rubber band half a marble width behind the baseline and parallel to it.

2. Roll the marble down an angle line towards the rubber band.

3. Observe the marble bounce and use another line to estimate the angle of reflection.

A procedure describes how an experiment will be done. Procedures are often a list of steps that must be done in order.

Law of Reflection ProofUse SNB pages 57-59.1. Problem: Write it.2. Research: Write the law of reflection.3. Hypothesis: Make a prediction. Write how you

think the hitting angle will compare to the bouncing angle. (marbles will be provided once these items are complete.)

Follow the printed guide and complete numbers 4, 5, & 6