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Energy Forms and Transfer — Free MYP1 Sciences Practice Questions
1QuestionClosed Systems and Energy AccountingConcept Practice
2 marks~3 minCriterion B
A student drops a ball from different heights onto a mat and measures how high it bounces each time.
a
Identify the independent variable and the dependent variable in this investigation. [1]
b
State one variable that must be kept the same to make this a fair test. [1]
Solutions
2QuestionClosed Systems and Energy AccountingConcept Practice
2 marks~3 minCriterion A
A toy car powered by a battery moves inside a sealed clear plastic box. The car slows down and stops.
a
Identify the type of system the sealed box creates. [1]
b
Describe what happens to the energy from the battery by the time the car stops. [1]
Solutions
3QuestionClosed Systems and Energy AccountingConcept Practice
2 marks~3 minCriterion A
The diagram below shows a sealed thermos containing hot soup. It has three parts: the soup, the air gap, and the thermos wall.
a
Identify which part stores thermal energy. [1]
b
Describe why that part stores thermal energy. [1]
Solutions
4QuestionExplaining Why Energy is Never Lost Only TransferredConcept Practice
4 marks~6 minCriterion C
A child rolls a toy car down a ramp. The car speeds up as it goes down, then rolls across a carpet and stops.
a
Name the type of energy the car has when it is moving. [1]
b
Describe what happens to the car's energy when it stops on the carpet. [1]
c
The carpet feels slightly warm after the car stops. A friend says the car's energy has disappeared. Describe how you would explain to your friend that this is not true, and identify one other form of energy that is also produced when the car stops. [2]
Solutions
5QuestionDefinition and Examples of ConductionConcept Practice
2 marks~3 minCriterion B
Three metal rods — copper, iron, and aluminium — of the same length and thickness are each heated at one end. A paper clip is attached to the other end of each rod using wax.
a
Identify the independent variable in this investigation. [1]
b
Identify the dependent variable in this investigation. [1]
Solutions
6QuestionComparing the Three Modes of Heat TransferConcept Practice
3 marks~5 minCriterion C
Three spoons — one metal, one wooden, one plastic — are placed into a cup of hot water at the same time. The table below shows how long each spoon took to feel hot at the handle.
| Spoon type: Metal | Wooden | Plastic |
|---|---|---|
| Time to feel hot (seconds): 5 | 30 | 45 |
a
Identify which spoon conducted heat the fastest. [1]
b
Describe the trend shown by the data. [1]
c
Compare how well metal conducts heat with how well plastic conducts heat, using the data to support your answer. [1]
Solutions
7QuestionComparing the Three Modes of Heat TransferConcept Practice
2 marks~3 minCriterion A
The diagram shows a pot of water on a stove. Arrow A points along the metal handle. Arrow B points through the water inside the pot. Arrow C points upward from the water surface into the air.
a
Identify which arrow shows conduction. [1]
b
Describe how heat travels along that arrow. [1]
Solutions
8QuestionDefinition and Examples of RadiationConcept Practice
2 marks~3 minCriterion D
A solar cooker has a shiny curved surface that faces the Sun.
a
Describe how the shiny curved surface helps to cook food. [1]
b
Identify one reason why a solar cooker might not work on some days. [1]
Solutions
9QuestionComparing Energy Resources for SustainabilityConcept Practice
5 marks~8 minCriterion C
Maya tests a small solar panel on a sunny day. She measures the voltage it produces three times.
9 AM: V 12 PM: V 3 PM: V
9 AM: V 12 PM: V 3 PM: V
a
Identify the time of day when the solar panel produced the highest voltage. [1]
b
Describe what the data shows about how the voltage changes across the day. [2]
c
Compare the voltage produced at 9 AM with the voltage produced at 3 PM, and suggest one reason why they are different. [2]
Solutions
10QuestionDefinition of Renewable ResourcesConcept Practice
2 marks~3 minCriterion B
A student places a solar panel in sunlight, then under a lamp, then near a candle. Each time, she measures how much electricity the solar panel produces.
a
Identify the independent variable in this investigation. [1]
b
Identify one variable that should be kept the same to make this a fair test. [1]
Solutions
11QuestionComparing Energy Resources for SustainabilityConcept Practice
2 marks~3 minCriterion D
A town must choose between building wind turbines or a coal power station for its electricity.
a
Name one way wind energy is different from coal energy. [1]
b
Describe one real-world impact the town might notice by choosing wind energy instead of coal. [1]
Solutions
12QuestionComparing Energy Resources for SustainabilityConcept Practice
2 marks~3 minCriterion A
The diagram shows three energy sources: A (wind turbine), B (coal power plant), and C (solar panel).
a
Identify which structure, A, B, or C, uses a non-renewable energy source. [1]
b
Describe why that energy source is non-renewable. [1]
Solutions
13QuestionEnergy Labels and Appliance RatingsConcept Practice
5 marks~8 minCriterion B
Five light bulbs have the following energy ratings and power use:
| Bulb A | 5-star | 8 W |
|---|---|---|
| Bulb B | 4-star | 12 W |
| Bulb C | 3-star | 16 W |
| Bulb D | 2-star | 20 W |
| Bulb E | ? star | 24 W |
a
Identify the pattern in the table by calculating the difference in power use between any two bulbs that are next to each other in the star ratings. [1]
b
State the star rating that Bulb E should receive. [1]
c
Describe how the star rating of a bulb is related to the amount of electricity it uses. Use Bulb A and Bulb E in your answer. [3]
Solutions
14QuestionCalculating Efficiency PercentConcept Practice
2 marks~3 minCriterion A
A desk lamp uses of electrical energy. Only becomes useful light energy. The remaining is wasted.
a
Identify the type of energy that the wasted becomes. [1]
b
Describe why this wasted energy is not useful for the lamp. [1]
Solutions
15QuestionCalculating Efficiency PercentConcept Practice
2 marks~3 minCriterion D
A family's old refrigerator uses 600 kWh of electricity each year. Their new refrigerator uses only 240 kWh each year.
a
Identify one real-world benefit of choosing the new refrigerator. [1]
b
Describe how this benefit happens, using the electricity figures above. [1]
Solutions
16QuestionMechanical and Nuclear EnergyConcept Practice
2 marks~3 minCriterion B
A student drops a rubber ball from three heights: 10 cm, 20 cm, and 30 cm. Each time, the student measures how high the ball bounces back up.
a
Identify the independent variable in this experiment. [1]
b
Identify the dependent variable in this experiment. [1]
Solutions
17QuestionEnergy in Daily Life ApplicationsConcept Practice
2 marks~3 minCriterion D
The diagram shows a toaster with three arrows. Arrow X points from the electrical outlet into the toaster. Arrow Y points from the toaster to the toast. Arrow Z points from the toaster into the air above.
a
Identify which arrow shows the useful thermal energy output. [1]
b
Describe why that arrow represents useful energy. [1]
Solutions
18QuestionDefinition and Examples of Different Energy TypesConcept Practice
4 marks~6 minCriterion A
The diagram shows a child on a swing at three positions: A (high back), B (lowest point), and C (high front).
a
Identify the main type of energy the child has at position A. [1]
b
Describe what happens to the child's energy as they swing from position A down to position B. [2]
c
Compare the child's movement at position A with their movement at position B, and explain how this difference is linked to their energy. [1]
Solutions
19QuestionMechanical and Nuclear EnergyConcept Practice
5 marks~8 minCriterion C
Sam holds a rubber ball at the top of a playground slide, then lets it go. The ball is still at the top, then moves fast at the bottom.
a
Name the type of energy the ball has at the top because it is high up. [1]
b
Describe what happens to the ball's height energy and movement energy as it falls from the top to the bottom of the slide. [2]
c
Sam says: "The ball has less total energy at the bottom than at the top because it lost its height energy." Do you agree? Explain your answer by comparing the ball's total energy at the top and at the bottom. [2]
Solutions
20QuestionEnergy 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
21QuestionEnergy 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
22QuestionEnergy 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
23QuestionEnergy 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
24QuestionEnergy Labels and Appliance RatingsAssessment Practice
6 marks~9 minCriterion C
Maya checks the energy labels on three appliances at home. The monthly electricity use for each is shown below.
Hair dryer: 120 units
Mini fridge: 80 units
Gaming console: 150 units
Hair dryer: 120 units
Mini fridge: 80 units
Gaming console: 150 units
a
Identify the appliance that uses the least electricity each month. [1]
b
List the three appliances in order from lowest to highest monthly electricity use. [2]
c
Maya's friend says, "The appliance that uses the least electricity is always the best choice for saving energy." Describe one reason why this statement is not always correct. [3]
Solutions