Let Us Practice

Question 1

The difference of shadows cast at Alexandria and Syene

Answer 1

Eratosthenes

Question 2

Earth should be a sphere because a sphere is a perfect form.

Answer 2

Pythagoras

Question 3

Cited that the North Star should be seen at the same time if the Earth was flat.

Answer 3

Aristotle

Question 4

The first to observe that the shadow cast by Earth during lunar eclipse is circular.

Answer 4

Anaxagoras

Question 5

Spread the idea of spherical Earth through his dialogue Phaedo

Answer 5

Plato

Question 6

The Earth should be a sphere because the Earth’s shadow to the Moon is always round during the lunar eclipse

Answer 6

True

Question 7

The North Star is used as an argument to prove that the Earth is spherical as it can be seen at a fixed position at different locations.

Answer 7

Different position

Question 8

When ships travel on the horizon, the hulls disappeared first before the sail as if it sinks.

Answer 8

True

Question 9

Eratosthenes observed that the Sun is directly overhead at Syene and at 7o at Alexandria.

Answer 9

True

Question 10

The earth is flat

Answer 10

Spherical