MODELS OF THE UNIVERSE

Question 1

2 MODELS

Answer 1

geocentric
heliocentric

Question 2

has the Earth at the center of the solar system

Answer 2

geocentric model

Question 3

places the sun as the center of the
solar system and the planets orbit around it.

Answer 3

heliocentric

Question 4

scientists that support geocentric universe

Answer 4

eudoxus
aristotle
ptolemy

Question 5

proposed a model of the universe to explain the apparent opposite motion of some planets.

Answer 5

eodoxus

Question 6

the apparent opposite motion of some planets

Answer 6

retrograde motion

Question 7

He placed Earth at the center and explained that various spheres are needed to explain the observed movement of objects.

Answer 7

eudoxus

Question 8

the apparent or actual movement of an object in the opposite direction of other objects in its system

Answer 8

retrograde motion

Question 9

“Retrograde” is derived
from the Latin words

Answer 9

retro = backward
gradus = step

Question 10

In his model, the universe was spherical but infinite. Concentric spheres surrounded Earth, with objects following perfectly circular orbits that were guided by “souls”.

Answer 10

aristotle

Question 11

planets orbit in perfect circle

Answer 11

aristotle’s geocentric universe

Question 12

the planets do not orbit in perfect circles around the Earth

Answer 12

ptolemy

Question 13

He proposed another model where the whole universe moved about a fixed, stationary Earth.

Answer 13

ptolemy

Question 14

He accounted for the apparent motions of the planets around the earth by assuming that each planet moved around a sphere called an epicycle

Answer 14

ptolemy

Question 15

The center of the epicycle moved on a larger sphere called a

Answer 15

deferent

Question 16

in ptolemy universe, planets around the earth by assuming that each planet moved around a sphere called an

Answer 16

epicycle

Question 17

Ptolemy’s model was able to predict the movements of the planets with certain accuracy but it was not able to explain the observable changes in the phases of

Answer 17

venus

Question 18

scientists that support heliocentric universe

Answer 18

aristarchus
copernicus
giordano bruno

Question 19

described Earth as a body that rotated daily around an axis and revolved annually around the sun

Answer 19

aristarchus

Question 20

The stars were fixed in a large sphere with the sun at the center

Answer 20

aristarchus universe

Question 21

introduced the concept of a heliocentric universe – the sun is at its center.

Answer 21

nicolaus copernicus

Question 22

He explained that Earth is only one of the many planets that revolve around the sun

Answer 22

nicolaus copernicus

Question 23

Philosopher and Heretic (1548-1600) Supported the idea of heliocentrism

Answer 23

giordano bruno

Question 24

became an enemy of catholic church

Answer 24

giordano bruno

Question 25

the first person to attempt to calculate the distance of the earth to the sun during the 3rd century BCE.

Answer 25

aristarchus of samos

Question 26

adapted Aristotle’s geocentric theory of the universe. - the planets do not orbit in perfect circles around the earth. Some planetary objects like the Mars appear to move backwards first then move forward in large loops.

Answer 26

ptolemy

Question 27

introduced the concept of a heliocentric universe where the sun serves as its center. He explained that Earth is only one of the many planets that revolve around the sun.

Answer 27

nicolaus copernicus