What are waves?
1 mark · EasyDescribe, in one sentence, how a wave moves energy across a lake after a stone is thrown in.
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Energy is carried by waves moving outward from where the stone lands, but the water itself stays in place.
Also accept: Wave carries energy across the lake; water does not move from place to place
Common mistakes: Water moves across the lake
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Marking points
B1 · 1 mark · Describes that the energy moves by waves, not by water moving with it.
Worked solution
The energy from the stone is carried outwards by the waves, while the water itself moves mainly up and down and does not travel with the wave.