ASTRONOMY: Chapter 2

A studyguide for the Chapter 2 Science Test -- Astronomy

13 cards   |   Total Attempts: 184
  

Cards In This Set

Front Back
Aristotle and Ptolemy thought that _____ is at the center of the solar system
Earth
Copernicus thought that the ___ is at the center of the planets. _______'s observations supported Copernicus's theory.
Sun
Galileo
______ discovered that the orbits of the planets are ________.
Kepler
Ellipses
Newton concluded that two factors - _______ and _______ - combine to keep the planets in orbit
Inertia&Gravity
The sun's energy comes form _______ ______.
Nuclear Fusion
The sun's atmosphere has three layers: the ___________, the ____________, and the ______.
Photosphere
Chromosphere
Corona
Features on or above the sun’s surface include ________, ___________, and _____ ______.
Sunspots
Prominences
Solar Flares
The four inner planets – Mercury, Venus, Earth, and Mars- are _____ and have _____ surfaces. They are often called the __________ planets.
Small
rocky
terrestial
The four outer planets – Jupiter, Saturn, Uranus, and Neptune – are much larger than _____, and are made almost entirely of _____.
Earth
Gases
STUDY VENN DIAGRAM
STUDY VENN DIAGRAM
Comets are chunks of ___ and ____ that usually have long, _________ orbits.
Ice
Dust
Elliptical
  Most _________ are objects that revolve around the sun between the orbits of ____ and _______.
Asteroids
Mars
Jupiter
__________ usually come from comets or asteroids.
Meteoroids