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WorksheetsY8 Physics Energy Quiz
Total questions: 19
Worksheet time: 19mins
Energy efficiency
Measure of the useful energy
Measure of the wasted energy
Kinetic energy
Potential energy
Kinetic energy.
Total energy
Movement
Stationary
Gravity
Thermal energy.
Moving
Weather
Cold
Heat
Potential energy.
Spring compressed
Object held at a height
Conservation of energy law
Potential + kinetic energy
Energy efficient lightbulbs (compared to a standard lightbulb).
Use more energy
Use less energy
Use the same energy overall
Take longer to light up but use more electricity
Efficiency equals
Useful energy produced/energy input
Useful energy produced/energy input x 100
Useful energy produced/energy input divided by 100
work
A kilojoule is 1000 Joules
True
False
No, it's a kilogram of Joules
No, it's James Joules' fault
An orange is 500 Joules, a pear 1000 Joules and a toffee apple 1500 Joules. If Bindi ate all 3 for lunch how many kilojoules would she have eaten in total?
3000
30
3
300
At the top of a rollercoaster the gravitational potential energy is at its maximum.
True
False
No, total energy is zero
Depends on the height
At the top of a rollercoaster a stationary cart has its kinetic energy at its minimum.
False
True
A rollercoaster will always have the same total energy throughout the ride if no energy is lost.
True
False
If a car loses some of its chemical energy obtained from fuel as engine heat instead of transmitting all the energy to its wheels then it is
100% efficient
90% efficient
Can't give an exact value but somewhat efficient
Needs to be sold
The higher a roller coaster is
the more potential energy it has
the less potential energy it has
the heavier it is
the more gravity it has
If you wind up a toy car the energy transformed is in the following sequence
kinetic to potential to heat
heat to gravitational to kinetic
kinetic to potential to kinetic to heat
Kinetic to elastic potential energy to kinetic to heat
Useful energy in a car
heat
electric
chemical
mechanical (kinetic)
Sound in a stereo is a useful form of energy and comes from electric energy transformation
Yes
No
Depends on the type of music
No, it's solar waves that provide the energy first
A torch battery is chemical energy converted to
Nuclear energy
Heat energy
Sound energy
Light energy
Heat energy produced by a torch is useful energy and efficient use of the battery's chemical energy
No, it is wasted energy as a torch is mainly used to provide light energy
Yes, , the main use of a torch is to keep warm
How ridiculous, the sun supplied all energy
Plants can do this anyway so why bother
An electric toaster is never 100% efficient as some of the electrical energy is converted to
sound energy
light energy
nuclear energy
burnt toast
