(a)[2]
The five later stages in the life cycle of a very massive star are: black hole, protostar, red supergiant, stable star, supernova. Enter these stages into Table 9.1 in the order in which they happen.
(b(i))[1]
State the name of the force acting inwards.
(b(ii))[1]
Describe what produces the outward force.
(c(i))[1]
State the meaning of a ‘light-year’.
(c(ii))[1]
State how long elapsed between the explosion that formed SN185 and the electromagnetic radiation from it reaching Earth.
(c(iii))[2]
There is no redshift detected in the electromagnetic radiation from the remnants of SN185, whereas the electromagnetic radiation from the remnants of SN2014J shows a large redshift. Explain this difference.
(d)[2]
Explain how the heavier elements come to be formed.