Red-Shift & the Expanding Universe Quiz
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5 questions, one answer each
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1. According to the Doppler effect, what happens to the observed wavelength of light from a source moving away from an observer?
- A. It decreases
- B. It increases
- C. It stays the same
- D. It becomes zero
2. What is red-shift?
- A. A decrease in wavelength of light from distant galaxies
- B. An increase in wavelength of light from distant galaxies, showing they are moving away
- C. A colour change caused by a galaxy's temperature
- D. A shift in the position of stars in the sky over one night
3. What does the relationship between distance and red-shift tell us?
- A. Nearer galaxies show greater red-shift than distant ones
- B. The further away a galaxy is, the faster it is moving away
- C. All galaxies move away from us at exactly the same speed
- D. Red-shift has no relationship with distance
4. What is cosmic microwave background radiation (CMBR)?
- A. Radiation emitted only by black holes
- B. Electromagnetic radiation filling the universe, originating shortly after the universe began
- C. A type of radiation only detected on Earth
- D. Visible light emitted by all stars equally
5. A student claims red-shift alone fully proves the Big Bang theory, with no other evidence needed. Why is this an incomplete view?
- A. Red-shift is not real evidence for anything
- B. Cosmic microwave background radiation is also key evidence, and the Big Bang is the only theory that explains it
- C. The Big Bang theory has since been disproven by red-shift
- D. Red-shift proves the universe is contracting, not expanding