Difference between revisions of "4-WAV-04a"
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==Main Body of Lesson== | ==Main Body of Lesson== | ||
− | * Assign each group of pupils two sections of the EM spectrum, pupils should find the uses of one section and the dangers of another (AGR has hand-out cards for pupils). | + | * Go through EM circus with group, AGR ppt contains nice pictures to talk about. |
+ | *Assign each group of pupils two sections of the EM spectrum, pupils should find the uses of one section and the dangers of another (AGR has hand-out cards for pupils). | ||
* Pupils present uses and dangers to the class. | * Pupils present uses and dangers to the class. | ||
* During talks pupils should make rough notes, which will then be made into neat notes for homework. | * During talks pupils should make rough notes, which will then be made into neat notes for homework. | ||
+ | * Alternatively go through the following with the group: | ||
+ | ====Uses==== | ||
+ | * Radio - communication | ||
+ | * Microwave - communication, energy transfer (e.g. microwave oven, solar satellite) | ||
+ | * Infrared - thermal energy transfer, night vision | ||
+ | * Visible | ||
+ | * Ultraviolet - sterilisation, tanning, | ||
+ | * X-ray - medical (diagnosis), x-ray diffraction (crystallography) | ||
+ | * Gamma ray - sterilisation, medical (treatment) | ||
+ | |||
+ | ====Dangers==== | ||
+ | * Radio - negligible hazard | ||
+ | * Microwave - negligible hazard, internal heating | ||
+ | * Infrared - surface heating | ||
+ | * Visible | ||
+ | * Ultraviolet - blindness, sunburn | ||
+ | * X-ray - blindness, cancers (mutation) | ||
+ | * Gamma ray - blindness, cancers (mutation) | ||
==Plenary== | ==Plenary== |
Revision as of 10:21, 31 October 2010
Contents
Outcomes
- Pupils can identify the sections of the electromagnetic spectrum.
- Pupils can identify the uses and dangers of sections of the electromagnetic spectrum.
Specification References
- 3.9, 3.10, 3.11, 3.12
Starter
- Show pupils EM spectrum circus.
Main Body of Lesson
- Go through EM circus with group, AGR ppt contains nice pictures to talk about.
- Assign each group of pupils two sections of the EM spectrum, pupils should find the uses of one section and the dangers of another (AGR has hand-out cards for pupils).
- Pupils present uses and dangers to the class.
- During talks pupils should make rough notes, which will then be made into neat notes for homework.
- Alternatively go through the following with the group:
Uses
- Radio - communication
- Microwave - communication, energy transfer (e.g. microwave oven, solar satellite)
- Infrared - thermal energy transfer, night vision
- Visible
- Ultraviolet - sterilisation, tanning,
- X-ray - medical (diagnosis), x-ray diffraction (crystallography)
- Gamma ray - sterilisation, medical (treatment)
Dangers
- Radio - negligible hazard
- Microwave - negligible hazard, internal heating
- Infrared - surface heating
- Visible
- Ultraviolet - blindness, sunburn
- X-ray - blindness, cancers (mutation)
- Gamma ray - blindness, cancers (mutation)
Plenary
- Use Jodrell Bank's Chromoscope to explore the sky in different parts of the spectrum.
Homework
- Using rough notes created in class, combined with textbook/internet, pupils create neat notes on uses/dangers of each section of the EM spectrum.
Additional Information
Resources Required
Textbook References
- Pople 7.11 pp. 160-163