Science: Middle School: Grades 6, 7 and 8 Quiz - Energy Transfers (Questions)

This Science quiz is called 'Energy Transfers' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.

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Some ways that energy transfer occurs are: radiation, heat conduction, convection, electrical power transmission and mechanical work. In Science, the Law of Conservation of Energy states that energy can be transformed, it can't be created or destroyed.

1. Which is the MAIN energy transfer taking place when a candle burns?
[ ] Chemical → light
[ ] Chemical → sound
[ ] Light → chemical
[ ] Thermal → chemical
2. Which is the MAIN energy transfer taking place when a gas fire burns?
[ ] Chemical → sound
[ ] Chemical → thermal
[ ] Thermal → chemical
[ ] Thermal → light
3. Which is the MAIN energy transfer when a light bulb is switched on?
[ ] Electrical → light
[ ] Electrical → sound
[ ] Light → electrical
[ ] Light → thermal
4. Which is the MAIN energy transfer when using a microphone?
[ ] Electrical → sound
[ ] Electrical → thermal
[ ] Sound → electrical
[ ] Sound → thermal
5. Which is the MAIN energy transfer in a loudspeaker?
[ ] Electrical → sound
[ ] Electrical → thermal
[ ] Sound → electrical
[ ] Sound → thermal
6. Which is the MAIN energy transfer when you drop a ball?
[ ] Kinetic → potential
[ ] Kinetic → sound
[ ] Potential → kinetic
[ ] Potential → thermal
7. Which is the MAIN energy transfer in a solar cell on a calculator?
[ ] Electrial → light
[ ] Light → electrical
[ ] Light → kinetic
[ ] Light → thermal
8. Which is the MAIN energy transfer when a cyclist brakes to stop?
[ ] Kinetic → elastic
[ ] Kinetic → potential
[ ] Kinetic → thermal
[ ] Thermal → kinetic
9. Which is the MAIN energy transfer when a ball rolls UP a ramp?
[ ] Kinetic → potential
[ ] Kinetic → thermal
[ ] Potential → kinetic
[ ] Potential → sound
10. Which is the MAIN energy transfer when a wind-up clockwork toy is released?
[ ] Elastic → kinetic
[ ] Elastic → potential
[ ] Kinetic → elastic
[ ] Kinetic → sound
Science: Middle School: Grades 6, 7 and 8 Quiz - Energy Transfers (Answers)
1. Which is the MAIN energy transfer taking place when a candle burns?
[x] Chemical → light
[ ] Chemical → sound
[ ] Light → chemical
[ ] Thermal → chemical
Thermal energy is also produced
2. Which is the MAIN energy transfer taking place when a gas fire burns?
[ ] Chemical → sound
[x] Chemical → thermal
[ ] Thermal → chemical
[ ] Thermal → light
The energy stored in gas is chemical, light is also produced but is not the main product
3. Which is the MAIN energy transfer when a light bulb is switched on?
[x] Electrical → light
[ ] Electrical → sound
[ ] Light → electrical
[ ] Light → thermal
4. Which is the MAIN energy transfer when using a microphone?
[ ] Electrical → sound
[ ] Electrical → thermal
[x] Sound → electrical
[ ] Sound → thermal
A microphone converts sound into an electrical signal. This is then passed to a speaker which reverses the process
5. Which is the MAIN energy transfer in a loudspeaker?
[x] Electrical → sound
[ ] Electrical → thermal
[ ] Sound → electrical
[ ] Sound → thermal
6. Which is the MAIN energy transfer when you drop a ball?
[ ] Kinetic → potential
[ ] Kinetic → sound
[x] Potential → kinetic
[ ] Potential → thermal
The ball has potential (stored) energy due to gravity
7. Which is the MAIN energy transfer in a solar cell on a calculator?
[ ] Electrial → light
[x] Light → electrical
[ ] Light → kinetic
[ ] Light → thermal
8. Which is the MAIN energy transfer when a cyclist brakes to stop?
[ ] Kinetic → elastic
[ ] Kinetic → potential
[x] Kinetic → thermal
[ ] Thermal → kinetic
The thermal (heat) energy is produced by friction
9. Which is the MAIN energy transfer when a ball rolls UP a ramp?
[x] Kinetic → potential
[ ] Kinetic → thermal
[ ] Potential → kinetic
[ ] Potential → sound
As the ball rolls up, it gains potential energy due to gravity
10. Which is the MAIN energy transfer when a wind-up clockwork toy is released?
[x] Elastic → kinetic
[ ] Elastic → potential
[ ] Kinetic → elastic
[ ] Kinetic → sound