Geo Science - Chapter 22 Origin of Modern Astronomy

Which ancient astronomer developed a geocentric model of the universe explaining the observable motions of the planets?

• Aristotle

• Ptolemy

• Copernicus

• Newton

The first accurate measurement of the size of the Earth was made by _____.

• Eratosthenes

• Aristotle

• Ptolemy

• Newton

Hipparchus was best known for his _____.

• calculations of Earth's size

• star catalog

• observations of the moon

• discovery of Saturn

Which of the following was unknown to the ancient Greeks?

• Earth

• Mars

• Venus

• Uranus

Aristotle concluded that the Earth was round because _____.

• it always cast a curved shadow during a lunar eclipse

• he sailed around the world

• he calculated Earth's circumference

• it exhibited retrograde motion

The apparent westward movement of a planet against the background of stars is called _____.

• retrograde motion

• revolution

• rotation

• universal gravitation

According to the ancients, the stars traveled around Earth on a transparent, hollow _____.

• equatorial plane

• celestial sphere

• solar orb

• ellipse

The geocentric model of the universe stated that _____.

• Earth revolved around the celestial sphere

• the sun was the center of the universe

• Earth was a "wanderer"

• Earth was the center of the universe

In the Ptolemaic model of the universe _____.

• Earth was flat

• Earth was the center of the universe

• the sun was the center of the solar system

• Earth was much smaller than the sun

One astronomical unit (AU) averages about _____.

• 38 million kilometers

• 93 million kilometers

• 150 million kilometers

• 210 million kilometers