Difference between revisions of "3-RAD-01"
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− | * | + | * Write a dialogue between two people explaining the plum pudding and Rutherford models, the Geiger and Marsden’s Experiment and how their observations led to the new model of the atom. |
=Additional Information= | =Additional Information= |
Revision as of 16:16, 11 May 2008
Contents
Outcomes
- Student should be able to describe and compare the Plum Pudding model and the Rutherford model of the atom.
- Students should recall that like charges repel.
- Using the observations from the Geiger and Marsden’s experiment they should be able to make conclusions about the structure of the atom and how they support the Rutherford model.
Specification References
- 7.15 Describe the results of Geiger and Marsden’s experiments with gold foil and alpha particles
- 7.16 Describe Rutherford’s nuclear model of the atom and how it accounts for the results of Geiger and Marsden’s experiment and understand the factors (charge and speed) which affect the deflection of alpha particles by a nucleus.
Starter
- Have students read outloud, and in turn, the dialogue on Radioactivity
Main Body of Lesson
- Use the Rutherford model to simulate the experiment. Start with ‘dilute positive sphere’ and then add the nucleus after. This should be done undercover (in a box) Students should only observe the result.
- Teacher must state that the alpha particles are positively charged.
- Emphasise the observations as a class and then split them into groups and using the observations and conclusions sheet they could try to draw a conclusion on the structure of the atom.
Plenary
- Remove the box and review the conclusions made
Homework
- Write a dialogue between two people explaining the plum pudding and Rutherford models, the Geiger and Marsden’s Experiment and how their observations led to the new model of the atom.
Additional Information
Resources Required
- Cavendish experiment
- Bowling Ball
- Lycra sheet
- Clever physics worksheet
Textbook References
- None
Website References
- A short biography of Henry Cavendish
Skills Addressed
Safety/Hazards
- Bowling ball is heavy
- Class II laser used in Cavendish experiment
Notes
- None