(a(i))[1]
Describe the effect of this rise in temperature on the air molecules.
(a(ii))[2]
Describe how this decrease in temperature affects the density of the aluminium. Explain your answer in terms of the separation of the atoms.
(b(i))[4]
Calculate the power required to melt 0.12 kg of the snow in 220 s.
(b(ii))[1]
The power of the solar radiation falling on each 0.12 kg of snow is larger than the value worked out in (b)(i). Suggest one reason why this happens.