(a(i))[1]
State the name of one planet whose orbit lies farther from the Sun than Venus.
(a(ii))[1]
State the name of one planet whose orbit lies nearer to the Sun than Venus.
(b)[3]
Calculate the average orbital speed of Venus. Give your answer in $\text{m/s}$.
(c)[1]
State the relationship between planetary orbital speed and distance from the Sun.
(d)[3]
State how the speed of a comet changes as it moves around the Sun. Explain your answer using ideas about the conservation of energy. You may include a labelled diagram in your answer.