When a cyclist brakes thermal (heat) energy is produced by friction.

# Energy Transfers

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

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