[2] Q10. (a) (i) Universe began at a (very) small (initial) point refers to Universe ‘it’ 1 sent matter outwards ‘explosion’ or causing Universe to expand ‘explosion’ accept gas / dust for matter accept rapid expansion for explosion 1 (ii) light shows a red shift owtte the term red shift on its own does not score a mark 1 galaxies moving away (from the Earth) refers to light ‘it’ refers to galaxies ‘they’ accept star for galaxy do not accept planet for galaxy 1 (b) reliability / validity of data accept check data accept collect more data 1 amend theory or
[2] Q10. (a) (i) Universe began at a (very) small (initial) point ‘it’ refers to Universe 1 ‘explosion’ sent matter outwards or ‘explosion’ causing Universe to expand accept gas / dust for matter accept rapid expansion for explosion 1 (ii) light shows a red shift owtte the term red shift on its own does not score a mark 1 galaxies moving away (from the Earth) ‘it’ refers to light ‘they’ refers to galaxies accept star for galaxy do not accept planet for galaxy 1 (b) reliability / validity of data accept check data accept collect more data 1 amend theory or