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WorksheetsEnergy Revision
Total questions: 17
Worksheet time: 9mins
What energy is stored in a moving object?
Elastic potential
Kinetic
Gravitatinal potential
What is the main energy transfer for a long distance runner?
Kinetic --> chemical
chemical --> gravitational potential
Chemical --> kinetic
Which of these cannot happen?
Energy cannot be stored
Energy cannot be dissipated
Energy cannot be created
If 4000J of energy is transferred and 2500J is usefully stored, how much energy is wasted?
6500J
1500J
3250J
What happens to dissipated energy?
It spreads out into the surroundings
It disappears from the system
It is transferred into usful stores
Which is the correct equation for Energy in the kinetic store?
KE = 21kx2
KE = m×h×g
KE = 21mv2
What is the correct units for work done?
Joules (J)
Watts (W)
Newtons (N)
Which is the correct equestion for work done?
Work done = Energy ÷ Time
Work done = Force x Distance
Work done = Force x Time
A hairdryer transformed 10,000J of energy in 4 sec. What is it's power?
10,000W
40,000W
2,500W
25,000W
What is the efficiency of Christmas lights that give out 10W of light radiation for an electrical input of 200W
20%
10%
5%
2%
How might a toy car be made more efficient?
Push it with greater force
Add oil to the moving parts
Press down on it harder
Which of these best describe a thermal conductor
A material that has low conductivity
A material that will not allow thermal energy through
A material that allows thermal energy through easily
If the same amount of heat energy is provided to a block twice the mass of the same material what would happen to the temperature rise?
It would double
It would be the same
It would half
Which of these is not a fossil fuel
Coal
Oil
Uranium
What does it mean if an energy resource is renewable?
It can be replenished
It can be recycled
It can be reused
Which energy resource is the least reliable?
Nuclear
Wind
Gas
Why does energy useage spike between 6-9pm
Power stations cost more to run in the evening
Less heating is needed in the evening, but more lighting is used
During this time, most families are at home using lights, electrical devises and heating
