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Red-shift
This topic uses observed galaxy spectra and cosmic microwave background radiation as evidence for an expanding universe.
25
Objectives
10
Flashcards
10
Questions
90 min
Study time
AqaGcsePhysicsSpace physics
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25 objective pages available
Red-shift and evidence for an expanding universe15 objectives
- (Physics only) Describe red shift as an increase in the observed wavelength of light from a galaxy.
- (Physics only) State that light from galaxies moving away from Earth is shifted to longer wavelengths.
- (Physics only) Explain that the further away a galaxy is, the faster it is moving away.
- (Physics only) Explain that more distant galaxies show a greater red shift.
- (Physics only) State that red shift provides evidence that the universe is expanding.
- (Physics only) Link red shift to the idea that galaxies are moving away from each other.
- (Physics only) Distinguish red shift as observational evidence from the Big Bang theory as an explanation.
- (Physics only) Describe the Big Bang theory as the theory that the universe began from a very small region that expanded.
- (Physics only) Explain that the observed expansion of the universe supports the Big Bang theory.
- (Physics only) Describe cosmic microwave background radiation as radiation left over from the early universe.
- (Physics only) State that cosmic microwave background radiation provides evidence for the Big Bang theory.
- (Physics only) Explain why the Big Bang theory is currently the only theory that can explain cosmic microwave background radiation.
- (Physics only) Interpret red-shift data to compare the relative movement of galaxies.
- (Physics only) Apply WS 1.2 when evaluating evidence for theories about the universe.
- (Physics only) Apply MS 2c and MS 4a when interpreting red-shift data or graphical evidence.
Galaxies, universe expansion and cosmology10 objectives
- (Physics only) State that galaxies are large collections of stars.
- (Physics only) State that the universe contains billions of galaxies.
- (Physics only) Use the Milky Way as an example of a galaxy.
- (Physics only) Explain that cosmology uses observations to develop and test explanations for the universe.
- (Physics only) Link galaxy observations to evidence for expansion of the universe.
- (Physics only) Explain how red-shift observations and cosmic microwave background radiation support the Big Bang theory.
- (Physics only) Distinguish the universe from a galaxy.
- (Physics only) Distinguish evidence for the Big Bang theory from the theory itself.
- (Physics only) Explain that scientific theories about the universe are supported, changed or replaced when new evidence is available.
- (Physics only) Apply WS 1.6 when explaining how evidence supports or challenges cosmological models.
Key terms
space-21-term-01 classification Red-shift and evidence for an expanding universespace-21-term-02 evidence Red-shift and evidence for an expanding universespace-57-term-01 classification Red-shift and evidence for an expanding universespace-57-term-02 evidence Red-shift and evidence for an expanding universespace-43-term-01 classification Red-shift and evidence for an expanding universespace-43-term-02 evidence Red-shift and evidence for an expanding universespace-40-term-01 classification Red-shift and evidence for an expanding universespace-40-term-02 evidence Red-shift and evidence for an expanding universespace-61-term-01 classification Red-shift and evidence for an expanding universespace-61-term-02 evidence Red-shift and evidence for an expanding universespace-48-term-01 classification Red-shift and evidence for an expanding universespace-48-term-02 evidence Red-shift and evidence for an expanding universe
Exam tips
- Red-shift and evidence for an expanding universe exam tip 44: Use the named Space Physics term first, then link it to (Physics only) Describe red shift as an increase in the observed wavelength of light from a galaxy with evidence or a clear sequence; add one boundary check for Red-shift and evidence for an expanding universe.
- Red-shift and evidence for an expanding universe exam tip 45: Use the named Space Physics term first, then link it to (Physics only) State that light from galaxies moving away from Earth is shifted to longer wavelengths with evidence or a clear sequence; add one boundary check for Red-shift and evidence for an expanding universe.
Common mistakes
- Red-shift and evidence for an expanding universe common mistake 1: Answer by clearly explaining how to (Physics only) Describe red shift as an increase in the observed wavelength of light from a galaxy..
- Red-shift and evidence for an expanding universe common mistake 1: Answer by clearly explaining how to (Physics only) State that light from galaxies moving away from Earth is shifted to longer wavelengths..
Practice preview
- space-21-mcq-01. For a distant galaxy spectrum, choose the strongest classification answer about (Physics only) Describe red shift as an increase in the observed wavelength of light from a galaxy. Focus vocabulary: identify classify category label definition object type membership distinction.
- space-21-mcq-02. For a red-shifted absorption lines, choose the strongest evidence answer about (Physics only) Describe red shift as an increase in the observed wavelength of light from a galaxy. Focus vocabulary: observation spectrum signal data measurement inference support pattern conclusion.
- space-21-mcq-03. For a cosmic microwave background radiation, choose the strongest sequence answer about (Physics only) Describe red shift as an increase in the observed wavelength of light from a galaxy. Focus vocabulary: stage timeline pathway before after development transition lifecycle order.
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