Greek Philosophy and Motion

Who was the first Greek philosopher to propose that the Earth is spherical?

• Pythagoras

• Aristotle

• Eratosthenes

• Anaximander

What natural observation suggested to the Greeks that the Earth is curved?

• The movement of stars in the night sky

• The round shadow of the Earth on the Moon during a lunar eclipse

• The change in temperature between seasons

• The way objects fall to the ground

Which Greek mathematician measured the Earth's circumference?

• Plato

• Archimedes

• Eratosthenes

• Thales

Why do ships disappear hull-first over the horizon?

• Because the sea is rough

• Due to the curvature of the Earth

• Because of mirages

• Due to perspective

What celestial phenomenon did Aristotle use to argue that the Earth is spherical?

• Solar eclipse

• Tides

• Lunar eclipse

• Equinox

Eratosthenes estimated the circumference of the Earth using what method?

• Measuring shadows at different locations

• Observing the Sun's movement

• Watching the stars from different angles

• Comparing seasons

Which of the following is NOT an argument used by the Greeks to prove Earth's shape?

• The round shape of the Moon and Sun

• The way ships disappear over the horizon

• The effect of gravity on falling objects

• The changing positions of stars when traveling north or south

What city did Eratosthenes use as a reference point to measure Earth's circumference?

• Alexandria

• Athens

• Rome

• Sparta

What did Eratosthenes compare between two cities to estimate the Earth's size?

• The difference in star positions

• The difference in the angle of sunlight at noon

• The time it took for the Sun to rise

• The depth of shadows at midnight

Which philosopher stated that the Earth must be a sphere because objects are pulled towards its center?

• Aristotle

• Pythagoras

• Socrates

• Plato