How did the Struve Geodetic Arc help scientists in the nineteenth century?
Answer and explanation
Correct answer: B. It gave a long measured arc of a meridian, from which they could calculate the size and shape of the Earth
- Step 1: The arc was a chain of survey points over about 2,800 km. Step 2. Measuring it allowed scientists to calculate the Earth's size and shape. Answer: the size and shape of the Earth. Why not the others: the arc was a survey, not a record of currents, stars or earthquakes.
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