Science & purpose · News English
Small samples, big questions about Mars
A mission plans to study where two moons came from.
Read the story, check the words, then answer the questions and speak.
Clues in a small sample
What can a small object tell us about a big place?
1Where did the two moons of Mars come from? Scientists do not yet have a final answer. A NASA report published on 15 October describes how a Japanese mission called MMX aims to find new clues.
2One idea is that a large object hit Mars long ago. Material from the impact may have formed the moons. Another idea is that the moons were once asteroids. Mars may have caught them with its gravity. These are possible explanations, not two proven stories.
3The mission plans to study both moons, Phobos and Deimos. It also aims to bring a sample from Phobos back to Earth. A sample is a small amount of material that researchers examine to learn more about something.
4NASA is contributing a science instrument and a sampling device. The instrument will help researchers study what Phobos is made of. The device is designed to collect surface material using short bursts of gas. By studying the material, scientists hope to understand the moons’ history better. The archive photograph shows Phobos in 2008. This lesson explains the research purpose, not the mission’s changing launch timetable.
Original teaching summary. Models and practice examples are illustrative, not news quotations.
Word help · Three useful words
Read the meanings and examples. Choose one word to use in your own sentence.
sample
a small amount taken for study
The scientist examines a sample.
clue
information that helps answer a question
The mark is an important clue.
surface
the outside or top of something
The surface feels rough.
Check your reading · Three questions
Choose one answer for every question, then check. You can change an answer and check again.
Useful English
Researchers study samples to find clues. Use to + base verb to explain purpose: We use a map to find a place. The map sentence is an illustrative example.
Name two tools you use and explain their purpose with to.
Speak: your ideas
Name two tools you use and explain their purpose with to.
Labelled model answer
Model: I use a map to find new places. I use a notebook to remember useful words.
Illustrative learning example, not a news quotation.
Alone: repeat without the model. Tutor: ask a follow-up question.
Mastery check · Three questions
Choose one answer for every question, then check. You can change an answer and check again.
Sources and reporting date
NASA report published 2026-10-15 at 15:58:08 EDT (UTC-04:00).
- NASA to Help Unlock Mysteries of Mars’ Moons in Upcoming Mission
NASA report published 2026-10-15 at 15:58:08 EDT (UTC-04:00). - Photograph source
Archive enhanced-colour photograph of Phobos, 23 March 2008. Not a photograph from MMX.