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D - Science - Ch 16

Observing the Solar System

QuestionAnswer
What is a geocentric model? a model that shows Earth at the center of the revolving planets and stars
What is a heliocentric system? a model that shows Earth and the other planets revolving around the sun
What did the Romans name the points of light that the Greeks called planets? Mercury, Venus, Mars, Jupiter, and Saturn
In a geocentric system, what is at the center of the universe? Earth
How was Ptolemy’s model different from the earlier Greek model? he thought the planets moved on little circles that moved on bigger circles
A description of the solar system in which all the planets revolve around the sun is called a ________________________. heliocentric system
In the 1500s, who further developed the heliocentric explanation for the motion of the planets? Copernicus
What were two observations that Galileo made through his telescope that supported the heliocentric model? there were four moons revolving around Jupiter, and that Venus goes through phases similar to the moon’s phases
What is an ellipse? an oval shape, which may be elongated or nearly circular
In what time period did Copernicus contribute to our knowledge of the solar system? Mid-1500's
In what time period did Brahe contribute to our knowledge of the solar system? Late 1500's
In what time period did Galileo contribute to our knowledge of the solar system? Early 1600's
In what time period did Kepler contribute to our knowledge of the solar system? Early 1600's
What was Copernicus' accomplishment? further developed heliocentric model; worked out arrangement of known planets
What was Brahe's' accomplishment? observed the positions of the planets for more than 20 years
What was Galileo's accomplishment? used a telescope to make discoveries that supported the heliocentric model
What was Kepler's accomplishment? discovered that the orbit of each planet is an ellipse
What does the solar system consist of? the sun, nine planets and their moons, and smaller objects, like comets and asteroids
Created by: lprinke
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