(a(i))[2]
State and explain which one of these planets is nearest to the Sun.
(a(ii))[1]
Calculate the surface temperature of planet D in $^{\circ}\text{C}$.
(a(iii))[2]
State and explain on which planet the object falls $2\,\text{m}$ in the shortest time. Ignore any effect from the atmosphere.
(b(i))[4]
Complete Fig. 10.1 by inserting the correct terms.
(b(ii))[1]
State the quantity that the brightness of a supernova in a galaxy is used to determine.