Physics Unit 2 Revision (Higher tier)

(c) explosion of star(s)/super nova (1)reference to big bang nullifies both marks reference to the star running out ofenergy/material nullifies both marksat the end of the ‘life’ of star(s) / when they ‘die’ (1)Question 23(a) converted into heliumaccept helium createdaccept converted into heavier elementsaccept used up in nuclear fusion / to produce energydo not accept any reference to burning(b) turns / expands into a red giantcontradictions negate markcontracts and explodes or becomes a supernova2[6]111may form a (dense) neutron star or (if enough mass shrinks to) form a blackholeaccept forms a neutron star and (then) a black holeQuality of written communicationcorrect points must be in sequence(c) (i) supernova or remains of an earlier starignore super nebula111(ii)younger or not formed at the time of the Big Bang1[7]