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Question 17N.3.HL.TZ0.a

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Date November 2017 Marks available [Maximum mark: 4] Reference code 17N.3.HL.TZ0.a
Level HL Paper 3 Time zone TZ0
Command term Outline Question number a Adapted from N/A
a.
[Maximum mark: 4]
17N.3.HL.TZ0.a

The Sun is a second generation star. Outline, with reference to the Jeans criterion (MJ), how the Sun is likely to have been formed.

[4]

Markscheme

interstellar gas/dust «from earlier supernova»

gravitational attraction between particles

if the mass is greater than the Jean’s mass/Mj the interstellar gas coalesces

as gas collapses temperature increases leading to nuclear fusion

MP3 can be expressed in terms of potential and kinetic energy

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