# Physics GCSE Space Physics question

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#1
The question is:

At different points in their lifecycle stars change from one group to another.

Describe what will happen to the sun between it leaving the main sequence group and becoming a white dwarf.

Use information from Figure 7. (attached below)

Last edited by TacticalDebation; 4 weeks ago
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4 weeks ago
#2
Where have you got to so far?
You could start with describing what you see on the graph for main sequence stars.
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#3
(Original post by mandyelicup)
Where have you got to so far?
You could start with describing what you see on the graph for main sequence stars.
I started by describing how the sun would transform into a Red Giant, which would mean the relative luminosity would increase but the surface temperature would decrease. This red giant would then become a white dwarf which would (in contrast) have a greater surface temperature but a far lower relative luminosity around the same level as Main Sequence Star when its relative luminosity is the lowest.

I do not think this is enough for 4 marks, where do I go from there?
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4 weeks ago
#4
(Original post by TacticalDebation)
I started by describing how the sun would transform into a Red Giant, which would mean the relative luminosity would increase but the surface temperature would decrease. This red giant would then become a white dwarf which would (in contrast) have a greater surface temperature but a far lower relative luminosity around the same level as Main Sequence Star when its relative luminosity is the lowest.

I do not think this is enough for 4 marks, where do I go from there?
Talk about why it changes from one stage to another. What does it run out of when it starts to become a red giant? What causes the drastic reduction in size from red giant to white dwarf?
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4 weeks ago
#5
(Original post by TacticalDebation)
I started by describing how the sun would transform into a Red Giant, which would mean the relative luminosity would increase but the surface temperature would decrease. This red giant would then become a white dwarf which would (in contrast) have a greater surface temperature but a far lower relative luminosity around the same level as Main Sequence Star when its relative luminosity is the lowest.

I do not think this is enough for 4 marks, where do I go from there?
thats the perfect answer for 4 marks
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