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8.3 Beyond Earth

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Question 2
F

The Figure shows the life cycles of two stars with different masses.

Figure

image

a.

Name stage A and stage B.

[2]
b.

Name event C.

[1]
c.

Explain how the protostar becomes hot enough for nuclear fusion to start.

[2]
d.

During the main sequence stage, the star stays the same size for billions of years.

Explain why.

[2]
Markscheme

8.3 Beyond Earth Questions

  1. GCSE
  2. /Physics
  3. /8.3 Beyond Earth

50 exam-style questions on OCR GCSE Physics 8.3 Beyond Earth, covering 8.3.1 Red-shift and the expanding universe, 8.3.2 Evidence for the Big Bang model, 8.3.3 Formation of the Sun and stellar equilibrium, 8.3.4 Radiation emitted by hot bodies, 8.3.5 The solar system and satellites, 8.3.6 Gravity and circular orbits, 8.3.7 Orbital radius and orbital speed, 8.3.8 Radiation balance and the temperature of the Earth, and 8.3.9 Seismic waves and exploring hidden structures. Each one has a worked solution and a mark scheme showing where the marks go.

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