Exam-style question
Try this first
Which of the following is NOT a characteristic of quasars?.
- A.They can outshine entire galaxies.
- B.They are powered by supermassive black holes.
- C.They have a consistent brightness over time.
- D.They exhibit significant redshift.
Model answer
What a good answer should say
- They have a consistent brightness over time.
Explanation
Why this works
Quasars often exhibit variability in brightness, which is a key observational feature, rather than consistent brightness.
Common mistake
No common mistake is linked to this question yet.