News by Levels · Level 2 · For teachers
Teacher guide & answers
In this lesson: Connect survey discovery to follow-up observation and the resulting growth question.
A Close Quasar Pair Raises a Growth Puzzle
How to use these two pages
Give learners the student worksheet. It contains the story and questions, without the answers. Keep this guide for yourself. Use it to lead the activity and explain the answers afterwards.
Student worksheetA simple 15–20-minute lesson
- Before reading · 2 minutes
Show the title. Ask: “What do you think this story is about?”
- Read and answer · 8–10 minutes
Give out the student worksheet. Learners read for the main idea, then reread to answer the 2 questions. They can compare answers with a partner.
- Discuss and write · 5–8 minutes
Check the answers below together. Ask learners to point to the clue in the story, then finish with the open question.
Adjust the support: Let learners use word help or Level 1 if needed. For a challenge, compare the wording in another level. This activity is not a proficiency test.
Answers to the 2 questions
The question numbers match the student worksheet. Each answer includes a reason and the clue learners can find in the story.
What did Gemini North follow-up observations add?
Correct answer: C — They separated the two bright objects
Why: The first paragraph distinguishes finding a companion in Webb data from separating the pair with Gemini North.
Clue in the story: Webb survey data revealed a companion to a distant quasar. Follow-up observations with Gemini North separated the two bright objects.
Why do the objects challenge growth explanations?
Correct answer: A — They were already extremely massive in the early universe
Why: Their large masses at an early epoch create the stated growth question.
Clue in the story: The pair is seen about 900 million years after the Big Bang. Its black holes were already extremely massive, challenging explanations of how rapidly such objects can grow.
The open question: accept different answers
Ask learners: Describe the two observational steps and the scientific question they leave.
One possible answer: Webb data revealed a companion, and Gemini North follow-up observations separated the two objects. Their black holes were already extremely massive about 900 million years after the Big Bang, leaving a question about how such rapid growth occurred.
This is an example, not the only correct answer. Look for a relevant idea, a reason and the learner’s own words. Learners can answer aloud or write one or two sentences.
Grammar to discuss
Already connects a state to an early time
were already extremely massive
Already stresses that the great masses had been reached by that early stage. It does not describe a future prediction.