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8.3 Beyond Earth

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Question 32
H

The cosmic microwave background radiation (CMBR) is detected coming from every direction in space with almost the same intensity.

Which statement explains this?

[1]
A

The Earth is at the centre of the universe, where the Big Bang happened

B

The CMBR is emitted in every direction by the Earth's own atmosphere

C

The CMBR is reflected many times by the planets in the solar system

D

The early universe was hot and dense everywhere, so the radiation fills all space

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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