Stellar Evolution: Comprehensive Assessment
15 Questions covering Paper 2 (MCQ), Paper 4 (Structured), and Paper 6 (Practical)
Section A: Multiple Choice Questions (5 questions)
Select the correct answer for each question. Each question is worth 1 mark.
What is the next stage in the life cycle of our Sun after it becomes a red giant?
What is the remnant left behind at the centre after a very high mass star explodes as a supernova?
What force causes an interstellar cloud of gas and dust (nebula) to collapse and form a protostar?
Which statement about the life cycle of stars is correct?
What is a protostar?
Examiner's Tips for Stellar Evolution:
Gravity vs Pressure: Always state that the inward force is gravitational and the outward force is thermal pressure from fusion. Do not just say "two forces balance."
Mass Matters: Less massive stars (like our Sun) become white dwarfs. Only very massive stars become neutron stars or black holes. Do not confuse these pathways.
Fusion Keywords: State "hydrogen nuclei fuse to form helium" not just "fusion occurs." Be specific about what is fusing.
New Elements: Supernovae create elements heavier than iron. Normal stellar fusion cannot create these. This is why supernovae are crucial for planet formation.
Time Scales: Star lifespans are millions or billions of years. Always reference this when explaining why we cannot observe a full stellar life cycle.
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