Electric Heaters and Thermal Energy
7th GradeScience40 min
Learning Objective
I can explain how electric heaters convert electrical energy into thermal energy.
Lesson Flow
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Guided Notes
Key concepts students will learn:
- •
Electric kettles automatically switch off when the water reaches boiling temperature as a safety feature.
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The kettle's heating element consists of a nichrome wire insulated by a heat conducting material like magnesium oxide.
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A bimetallic disc in the kettle bends when heated, triggering a switch to turn the kettle off when the water boils.
Practice
5 questions • Multiple choice & Short answer
Exit Ticket
“Explain how the nichrome wire in an electric kettle heats the water, including the role of electrical resistance.”
Teacher Guide
Get the complete package:
- Answer keys for all questions
- Differentiation strategies
- Extension activities
- Printable student handouts
