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WorksheetsEnergy revision
Total questions: 25
Worksheet time: 39mins
Which of the following is not a type of energy?
Kinetic energy
Potential energy
Sound energy
Temperature energy
What type of energy is referred to as "stored" energy?
Potential energy
Kinetic energy
Light energy
Sound energy
What causes an object to fall back to Earth?
Air
Weight
Magnetism
Gravity
What is the wasted energy in a mobile phone?
Heat
Light
Sound
The energy that an object has when it is at a height above the ground. The higher an object is, the more of this energy it has.
Gravitational potential energy
Heat energy
Kinetic energy
Chemical energy
Can come from a flame, the Sun, chemical reactions, electricity and nuclear explosions. It can burn, boil water, melt plastic, dry clothes and increase the temperature.
Nuclear energy
Heat energy
Sound energy
Chemical energy
The energy that an object has when it is moving. The faster the object moves, the more of this energy it has.
Potential energy
Kinetic energy
Heat energy
Elastic energy
Can come from a light bulb, glow-worm or a fire. Solar energy is this type of energy.
Light energy
Heat energy
Nuclear energy
Chemical energy
What happens when a rollercoaster is moving up its first hill?
Potential increases, kinetic decreases
Potential increases, kinetic increases
Potential decreases, kinetic decreases
Potential decreases, kinetic increases
Can come from a battery, power point or a thunderbolt. It can power a mobile phone, TV or a Playstation. It can kill if handled carelessly.
Electrical energy
Sound energy
Chemical energy
Potential energy
What is the energy transformation when a toaster toasts bread?
Electrical -> Heat + Light
Electrical -> Heat
Electrical -> Light
Heat -> Light
What is the energy transformation for when a skateboard rolls down a hill?
Kinetic -> Speed
Gravitational -> Kinetic + Heat + Sound
Gravitational -> Kinetic + Sound
Gravitational -> Kinetic
The law of energy conservation says the total energy before a process _______ the total energy after it
is less than
is more than
affects
equals
The SI Unit for Energy is
Joule
Newton
Calorie
Watt
Energy Efficiency is calculated by useful energy (Energy Out) divided by energy consumed (Energy In) , expressed as a percentage
False
True
What is the efficiency of a machine if 55.3 J of energy are consumed by the machine, but only 14.3 J of useful energy is produced by the machine?
0.25 J
26%
386%
3.86 J
What is the efficiency of the machine if the input (energy consumed) is 263 J and the output (useful energy) is 142 J?
6.26%
54%
100%
260%
What is the useful work output of a machine that consumes 2,800 Joules and an efficiency of 40 %?
2,760 J
1680 J
1120 J
70 J
How much energy is wasted by a machine if the energy consumed (input) is 263 J and the useful energy (output) is 142 J?
405 J
395 J
121 J
1.85 J
What type of energy is in this picture?
Kinetic
Elastic potential
Chemical
Gravitational potential
