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Level A1 – BeginnerCEFR A1
2 min
73 words
- Scientists study how the Earth formed from space rocks.
- They examine many different types of meteorites from space.
- Meteorites come from inner and outer parts of the system.
- A team at ETH Zurich re‑examined isotope data carefully.
- Isotopes are atoms of the same element that differ.
- The researchers used many isotope systems and methods.
- Their results show Earth came only from inner material.
- Jupiter likely acted as a barrier to outer rocks.
Difficult words
- meteorite — a rock from space that falls to EarthMeteorites
- isotope — atoms of one element with different massIsotopes, isotope systems
- scientist — a person who studies scienceScientists
- researcher — a person who studies and checks factsresearchers
- barrier — something that blocks movement or passage
- material — substance or matter used to make things
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- Would you like to be a scientist?
- Have you ever seen a rock from space?
- Can a big planet block rocks from space?
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