Energy and Energy Conversions (Junior Cert Science): Model Answers
📚 Model Answers
Understanding Energy Types and Electrical Components
Sample Answer
Question (a)
Answer
Stored energy in a battery is called Chemical energy.
Energy released from burning coal is called Heat energy.
The energy in a stretched elastic band is called Potential energy.
Energy in a moving object is called Kinetic energy.
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[12/12 Marks] Full marks awarded for correctly matching all four energy types to their descriptions. Each correct match is worth 3 marks.
Question (b)
Answer
Name the component labelled X: Battery/Cells
What happens to the thin wire when a current flows? The thin wire heats up/gets hot
Name a device that the student could put at Y to show that a current is flowing through the circuit. Device: Ammeter/Bulb/LED/Galvanometer
Name two household appliances that use the heating effect of an electric current:
- Electric kettle/Electric iron/Toaster
- Electric heater/Hair dryer/Electric oven
infoNote
[18/18 Marks] Full marks awarded for:
- Correctly identifying the battery/cells (4 marks)
- Explaining that the thin wire heats up (4 marks)
- Naming an appropriate device to detect current flow (4 marks)
- Naming two valid household appliances that use the heating effect (3 marks each)
Marking Scheme
