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Classification of stars (A-level only)

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Question 7

Analyse the structure of the Hertzsprung-Russell (HR) diagram and the evolution of a Sun-like star by addressing the following parts:

a.

State the standard range of values and direction of increase for both the absolute magnitude axis and the temperature axis of a standard HR diagram.

[2]
b.

State the approximate temperature and absolute magnitude of the Sun, and describe its position relative to the main sequence.

[2]
c.

Describe the path of a 1 M⊙1\,\text{M}_{\odot}1M⊙​ star on the HR diagram from its formation to its final state as a white dwarf.

[3]
d.

A star is cooler (redder) than the Sun but has a much higher power output. Describe where this star would be located on the HR diagram relative to the Sun.

[2]
e.

Discuss whether a supernova explosion and a remnant black hole can be plotted on a standard HR diagram.

[2]
Markscheme

Classification of stars (A-level only) Questions

  1. A Level
  2. /Physics
  3. /Classification of stars (A-level only)

18 exam-style questions on AQA A Level Physics Classification of stars (A-level only), covering Classification by luminosity (A-level only), Absolute magnitude, *M* (A-level only), Classification by temperature, black-body radiation (A-level only), Principles of the use of stellar spectral classes (A-level only), The Hertzsprung–Russell (HR) diagram (A-level only), and Supernovae, neutron stars and black holes (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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