Questions on Energy Sources
Q13. The drawing below shows a garden water feature. It is solar-powered.
The solar cell absorbs energy from the Sun. The solar cell is connected to a motor in the bowl. The motor drives a pump. Water is pumped up to the jug and it flows back down to the bowl.
(a) Use the information above to help you to complete the following sentences.
Choose words from the list.
(i) The useful energy change in the solar cell is from light to ......electrical 
......... energy.
1 mark
(ii) The useful energy change in the motor is from electrical energy to .....kinetic.......... energy.
1 mark
(iii) As the water flows from the jug to the bowl ........gravitational potential ........ energy is changed into ...........kinetic OR sound OR thermal ........ energy.
2 marks
(b) Give one advantage and one disadvantage of using a solar cell to power the water feature.
advantage
- the energy is renewable - it will not run out
- it does not use fuel or mains electricity so it is free to run
- a battery might leak
- no pollution from a solar cell
disadvantage
- if the Sun goes behind a cloud the pump will stop or slow down
- it will not work at night or in the dark
do not accept 'can be used again'
2 marks
Maximum 6 marks
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