The Universe and its Origins Quiz
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5 questions, one answer each
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1. What is red-shift?
- A. A decrease in the wavelength of light from a receding galaxy
- B. An increase in the wavelength of light from a receding galaxy
- C. A change in the colour of a star due to temperature only
- D. The disappearance of light from very distant galaxies
2. What does a greater red-shift indicate about a galaxy?
- A. It is closer and moving towards us
- B. It is further away and moving away faster
- C. It is not moving at all
- D. It has less mass than nearby galaxies
3. What does red-shift provide evidence for?
- A. That stars are shrinking
- B. That the universe (space itself) is expanding
- C. That gravity is getting weaker
- D. That galaxies are colliding
4. According to the Big Bang theory, how did the universe begin?
- A. From a cold, low-density cloud that slowly warmed
- B. From a very small region that was extremely hot and dense
- C. From the collision of two galaxies
- D. From a stable, unchanging state
5. What did supernova observations since 1998 reveal about the universe's expansion, and what remains unexplained as a result?
- A. Expansion is slowing down; explained fully by dark matter
- B. Expansion is accelerating; dark energy is a proposed but not fully understood explanation
- C. Expansion has stopped; no explanation is needed
- D. Expansion is constant; fully explained by gravity