Cosmology Quiz
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5 questions, one answer each
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1. What does the Big Bang theory state?
- A. The universe has always existed unchanged
- B. The universe began from a hot, dense point and has been expanding and cooling since
- C. The universe is shrinking over time
- D. Stars create new universes when they explode
2. What is red-shift?
- A. A decrease in wavelength from an approaching source
- B. An increase in the observed wavelength of light from a source moving away
- C. A colour change caused by dust in space
- D. The reddening of a star as it cools
3. Which two pieces of evidence support the Big Bang theory?
- A. Blue-shift and starlight
- B. Red-shift and Cosmic Microwave Background radiation
- C. Gravity and magnetism
- D. Sunspots and solar flares
4. A galaxy shows a larger red-shift than a nearer galaxy. What does this suggest?
- A. It is closer to Earth
- B. It is moving away from Earth faster
- C. It is not moving at all
- D. It is emitting more light
5. Using the red-shift equation, a galaxy's light has a reference wavelength of 400 nm and is observed at 404 nm. What is its recession velocity (approximately)?
- A. 3 × 10^4 m/s
- B. 3 × 10^6 m/s
- C. 3 × 10^8 m/s
- D. 3 × 10^2 m/s