News by Levels · Level 3 · For teachers
Teacher guide & answers
Black-Hole Fragmentation Study Identifies Narrow Theoretical Possibilities
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 was the method?
Correct answer: A — Calculations
Why: This was theoretical work.
Clue in the story: Physicists have investigated black-hole fragmentation in a Physical Review D paper published on October 22 and presented by SDU on October 23. The work analyses theoretical constraints rather than reporting a detected event.
What must fragments do?
Correct answer: B — Separate
Why: They must move apart.
Clue in the story: Thermodynamic rules prohibit ordinary non-rotating black holes from splitting. Near-maximal rotation may offer a limited exception, but requiring the fragments to separate imposes additional restrictions. Mathematical permission alone does not establish that fragmentation actually occurs.
The open question: accept different answers
Ask learners: Explain the finding and its limit.
One possible answer: Theoretical possibilities do not establish an observed split.
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.