GCSE level questions on the Earth in Space
Q18.
(a) A main sequence star in a distant galaxy is the same size and mass as the Sun.
Explain why the star is stable while it is in the main sequence stage of its life cycle.
[2 marks]
(b) Describe what will happen to the star between the main sequence stage and the end of the star's life cycle.
You should include the names of the stages in the life cycle of the star in your answer.
[3 marks]
(c) The sketch graph below shows how the speed of galaxies moving away from Earth varies with the distance of the galaxies from Earth.
Choose the letter representing the galaxy that would show the smallest observed change in the wavelength of visible light.
Give a reason for your answer.
[2 marks]
(Total 7 marks)
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