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Year 10 Energy
Test Description: Year 10 Physics questions on enrgy transfer, energy efficiency and eneryg saving mthods.
Instructions: Answer all questions to get your test result.
1) What is the name for the transfer of energy by vibrations?
A
Radiation
B
All of the above
C
Convection
D
Conduction
2) The process of warm air rising cooling and sinking is known as what?
A
Convection
B
Radiation
C
Conduction
D
All of the above
3) What is power measured in?
A
Kilowatt hours
B
Joules
C
Newtons
D
Watts
4) Through what process does heat energy from the sun reach Earth?
A
Radiation
B
Conduction
C
All of the above
D
Convection
5) How much energy is needed to heat up 2kg of water by 10 degrees. (c=4000)
A
40,000J
B
80J
C
200J
D
80,000J
6) A 1500W hairdryer is on for 30 mins. How much energy is transferred in kWhs?
A
45
B
0.75
C
750
D
450000
7) Cavity wall insulation costs £3000 and saves £120 a year. What is the payback time?
A
25 years
B
1 year
C
10 years
D
30 years
8) What does a step up transformer do?
A
Increases current and decreases voltage
B
Increases voltage and decreases current
C
Decreases voltage and decreases current
D
Increases voltage and increases current
9) Which of these applies to silver materials?
A
Poor emitters of heat energy
B
Good radiators of heat energy
C
Good absorbers of heat energy
D
Good emitters of heat energy
10) A good reason for putting pylons overground is...
A
Birds can rest on them
B
They are an eyesore
C
They are easily accessed if broken
D
People can climb them
*select an answer for all questions
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