Question text
40 Four of the stages in the life cycle of a star, until it becomes a red giant, are shown. W Inward force of gravitational attraction is balanced by an outward force from its centre. X Internal gravitational collapse produces an increase in temperature. Y It expands. Z Most of the hydrogen has been converted to helium. In which order do these stages occur, starting with the earliest? A W → X → Y → Z B W → X → Z → Y C X → W → Y → Z D X → W → Z → Y
40 Four of the stages in the life cycle of a star, until it becomes a red giant, are shown.
W Inward force of gravitational attraction is balanced by an outward force from its
centre.
X Internal gravitational collapse produces an increase in temperature.
Y It expands.
Z Most of the hydrogen has been converted to helium.
In which order do these stages occur, starting with the earliest?
A W → X → Y → Z
B W → X → Z → Y
C X → W → Y → Z
D X → W → Z → Y
Select your answer: