Question detail
What happens to the energy store of water when it is heated to boiling in an electric kettle?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Energy changes in a system, and the ways energy is stored before and after such changes
Question
- A. Energy is transferred from the kettle to the water, increasing its thermal energy.
- B. Energy is lost to the surroundings, decreasing the thermal energy of the water.
- C. The thermal energy of the water remains constant.
- D. Energy is converted into kinetic energy of the water molecules.
Answer
Energy is transferred from the kettle to the water, increasing its thermal energy.
Explanation
When water is heated in an electric kettle, energy is transferred from the kettle's heating element to the water, increasing its thermal energy until it reaches boiling point.
Common mistake
Misunderstanding Energy Transfer
Students often think that the energy from the kettle is only stored as thermal energy in the water and forget that energy is also transferred to the kettle itself.
Remember that energy is transferred to both the water and the kettle, and describe how the energy-store changes in both components.
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