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Ancient Greeks’ Evidences of a Spherical Earth

Quiz by Rhiza T. Erbina

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10 questions
Show answers
  • Q1
    How does lunar eclipse help explain that the shape of the Earth is round?
    Earth casts a round shadow on the moon during lunar eclipse.
    The moon is always casting a shadow lunar eclipse.
    The moon casts a round shadow on earth during a lunar eclipse.
    The earth sometimes casts a round shadow during lunar eclipse.
    60s
  • Q2
    Who is the philosopher who justified the round shape of the earth through lunar eclipse?
    Pythagoras
    Magellan
    Aristotle
    Erathosthenes
    60s
  • Q3
    How does the North Star, Polaris prove the spherical shape of the Earth?
    Polaris stays in one place in the sky regardless of your position on earth.
    If we were to travel from the North Pole to the equator, Polaris would seem to move farther from the horizon.
    When you are standing at the equator, Polaris moves closer to the middle of the sky.
    If we were to travel from the North Pole to the equator, Polaris would seem to move closer to the horizon.
    60s
  • Q4
    How do sailing ships prove that the earth is spherical?
    Sailing ships appear bigger as they sail away from the observer.
    Sailing ships appear to sink as they move closer to the observer.
    Sailing ships appear bigger as they move towards the observer.
    Sailing ships gradually disappear over the horizon.
    60s
  • Q5
    How did Eratosthenes prove that the earth is round or spherical?
    Calculation of the Earth's circumference by traveling to the North Pole.
    Calculation of the Earth's circumference using shadow.
    Calculation of the Earth's circumference by traveling to the moon.
    Calculation of the Earth's circumference by traveling to the South Pole.
    60s
  • Q6
    What causes the difference in the angle of shadows cast in Syene and Alexandria at noon during a summer solstice according to Eratosthenes?
    The curvature of the Earth’s surface.
    The distance between Syene and Alexandria.
    The depth of the well in Syene.
    The height of the vertical pole in Alexandria.
    60s
  • Q7
    Why is it that Eratosthenes’s calculation of the Earth’s circumference solidifies ancient Greeks’ belief of a spherical Earth?
    It is because he determined the value of the distance between the two cities from a complete circle.
    It is because he used vertical poles to observe the shadow cast on two different cities.
    It is because he observed the shadows cast on two different cities during the summer solstice.
    It is because he assumed that the light rays from the Sun are parallel when they reach Earth.
    60s
  • Q8
    Which of these pieces of evidence does not support the Greek's idea of a spherical Earth?
    The sail disappears last when a ship sails away over the ocean.
    The Earth's shadow cast on the surface of the Moon is round during a lunar eclipse.
    The North Star (Polaris) cannot be seen in the South Pole.
    The curvature of the Earth's surface causes the light rays to bend.
    60s
  • Q9
    Which of the following describes the position of Polaris if you travel closer to the North Pole?
    It gradually disappears.
    It doesn’t change its position in the night sky.
    It stays closer to the horizon.
    It seems to rise higher and higher in the night sky.
    60s
  • Q10
    Which of the following can be observed of a cruising ship sailing from the port to the open sea?
    It will become bigger and bigger.
    It will appear to sink then only the sail will be visible until it completely disappears.
    It will become smaller and smaller until it disappears.
    It will not change its size.
    60s

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