Deck 10: Geometry of the Moon, Earth, and Sun

Question 1

This Greek estimated the size and distance to moon and sun:

A) Aristotle
B) Pythagoras
C) Plato
D) Aristarchus

Answer 1

Aristarchus

Question 2

One big reason for the belief in the geocentric model was the lack of __________.

A) planetary motion
B) parallax
C) eclipses
D) lunar phases

Answer 2

parallax

Question 3

This Greek measured the size of the Earth very accurately with sticks and shadows:

A) Aristotle
B) Eratosthenes
C) Pythagoras
D) Plato

Answer 3

Eratosthenes

Question 4

Eratosthenes' method for measuring the size of the Earth is based on the assumption that

A) rays of sunlight are parallel.
B) lengths of shadows, for same sized objects, are the same everywhere.
C) the Earth is flat.
D) the Moon and Sun are always at a fixed angle of separation.

Question 5

The size of objects in the sky is usually measured by the objects' ______________.

Question 6

The angular size of an object depends ___________ on its distance.

Question 7

Parallax was eventually discovered by the Greeks.

Question 8

How big an object looks is called its angular size.