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Level A1 – BeginnerCEFR A1
1 min
58 words
- Many people have problems with sleep.
- Sleep loss affects health and safety.
- Researchers studied saliva to find signs.
- Saliva can show changes after no sleep.
- The study looked for small molecules.
- They found markers that show tiredness.
- The work was done by a university team.
- They want a quick test at work.
- A test could make roads safer.
Difficult words
- sleep loss — few hours of rest or no rest at night
- affect — change something or make it differentaffects
- saliva — clear liquid made in the mouth
- researcher — person who studies and tests thingsResearchers
- molecule — very small part of a substancemolecules
- marker — a sign or thing that shows a conditionmarkers
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- Do you often feel tired?
- Would you like a quick test at work?
- Do you think a test could make roads safer?
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