Exam-style question
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What does Hubble's law state regarding the relationship between velocity and distance?.
- A.Velocity is independent of distance
- B.Velocity decreases as distance increases
- C.Velocity increases as distance increases
- D.Distance is constant regardless of velocity
Model answer
What a good answer should say
- Velocity increases as distance increases
Explanation
Why this works
The evidence from Hubble's law indicates that there is a direct proportionality between the velocity of a galaxy and its distance from the observer. This shows that as galaxies move further away, they do so at higher velocities.
The implication is that this relationship supports the concept of an expanding universe, leading to the conclusion that the universe is not static but is continuously expanding.
Common mistake
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