News by Levels · Level 2 · For teachers

Teacher guide & answers

In this lesson: Connect distorted light with complementary research roles.

Hubble and Roman Bring Different Strengths to Galaxy Images

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 worksheet

A 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.

Which galaxies provide the bending gravity?
Correct answer: A — Nearer galaxies
Why: The first paragraph identifies nearer galaxies as the cause of the distortion.
Clue in the story: NASA’s new Hubble gallery shows distant galaxies distorted by the gravity of nearer galaxies. The bent light can form arcs.
Why combine the observations?
Correct answer: C — To study mass using detailed and wider views
Why: The second paragraph gives their different strengths and the intended study of mass.
Clue in the story: Hubble provides detailed individual views, while Roman covers a wider field. Researchers plan to combine their observations to study mass, including dark matter.

The open question: accept different answers

Ask learners: Describe the cause of the arcs and the planned benefit of combining observations.

One possible answer: The gravity of nearer galaxies distorts light from distant galaxies into arcs. Researchers plan to combine Hubble’s detailed views with Roman’s wider coverage to study mass, including dark matter.

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

A comparison of capabilities

while

While contrasts Hubble’s individual detail with Roman’s wider field here; it does not mean the capabilities are identical.