⚡ Show all working — the AI marks against the AQA mark scheme. Method marks awarded for correct working even if the final answer is wrong.
1 markMain sequence starAQA 8463 style
What process releases energy in a main sequence star like the Sun?
A Nuclear fission of uranium in the core
B Combustion of hydrogen in the core
C Nuclear fusion of hydrogen into helium in the core
D Gravitational collapse continuously releasing energy
4 marksStellar life cycleAQA 8463 P2 style
Describe the life cycle of a star similar to our Sun, from nebula to final state. (4 marks)
Hint: Five stages in order: nebula → protostar → main sequence → red giant → planetary nebula → white dwarf. Give brief explanation of each transition.
+40 XP
1 markLarge star endpointAQA 8463 style
A star much more massive than the Sun will eventually become a:
A White dwarf
B Red giant then planetary nebula
C Supernova, then either a neutron star or black hole
D Double star system
3 marksFormation of solar systemAQA 8463 style
Explain why the inner planets are rocky and the outer planets are gas giants. (3 marks)
Hint: Key concept: temperature gradient. Close to Sun = too hot for gases/ices to stay → rocky planets. Far from Sun = cold enough for gases/ices → gas giants.