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Energy Transformations — Free MYP1 Sciences Practice Questions
1QuestionEnergy Changes in Everyday DevicesConcept Practice
2 marks~3 minCriterion A
A toaster is plugged into the mains. It uses electricity to heat up and toast bread.
a
Name the type of energy that goes into the toaster. [1]
b
Describe what happens to that energy inside the toaster. [1]
Solutions
2QuestionEnergy Conversion from One Form to AnotherConcept Practice
4 marks~6 minCriterion D
A school puts solar panels on the roof. The panels turn sunlight into electrical energy to power the hallway lights. Only 20% of the light energy is turned into electrical energy.
a
Identify the energy transformation that happens in the solar panels. [1]
b
Describe one benefit of using solar panels at the school. In your answer, refer to the energy conversion. [1]
c
Describe one limitation of this solar panel system. In your answer, refer to the 20% figure. [2]
Solutions
3QuestionEnergy Changes in Everyday DevicesConcept Practice
2 marks~3 minCriterion B
A student uses two identical torches. One has a bright bulb and one has a dim bulb. Both are switched on at the same time. The student records how long each torch stays lit.
a
Identify the independent variable and the dependent variable in this investigation. [1]
b
Identify one variable the student should keep the same to make this a fair test. [1]
Solutions
4QuestionEnergy Flow Diagrams and Sankey Diagrams IntroductoryConcept Practice
6 marks~9 minCriterion C
A toy car uses 100 J of electrical energy. The maker claims the car is 90% efficient, meaning 90 J becomes movement energy and 10 J is wasted as heat and sound.
A student tests the car three times. The movement energy measured each time is:
Trial 1: 72 J Trial 2: 68 J Trial 3: 70 J
A student tests the car three times. The movement energy measured each time is:
Trial 1: 72 J Trial 2: 68 J Trial 3: 70 J
a
Identify the type of energy that is wasted by the toy car. [1]
b
Calculate the average movement energy from the three trials. [2]
c
The maker claims the car is 90% efficient. Describe how the student's results compare to this claim. [3]
Solutions
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