Tracking the Movement of Our Planet
Read the whole story in the app
In the app: the whole story at your level, listening, the quiz and the word cards.
The same story at six levels
How the first sentence reads at every level, from A1 to C2.
- A1
NASA researchers have a new method.
- A2
NASA researchers created a very accurate new method.
- B1
Earth's center of mass is the exact middle point of the planet's weight.
- B2
Earth is not completely still, which means its mass is in constant motion.
- C1
Earth is not completely still; its mass is in constant motion.
- C2
Earth is not a static sphere; its mass is in constant, subtle motion.
Key words
Words from the B1 text, with their meaning.
- shift
- moves slightly from one place to another
- accurate
- correct, exact, and without any mistakes
- combine
- joins two or more things together
- orbit
- a curved path followed by an object in space around a planet
- estimate
- guessed the size, cost, or amount of something
- seasonal
- happening or changing depending on the season
Rewritten with AI from facts reported by NASA. Read the original for the full report.