(a(i))[2]
State one Moon position for which an observer on Earth sees: 1. a quarter Moon 2. a full Moon
(a(ii))[1]
State the approximate period for the Moon to orbit the Earth.
(b(i))[3]
Calculate Earth's average orbital speed in $\text{km h}^{-1}$.
(b(ii))[2]
Calculate the time for light from the Sun to arrive at the Earth.