Chapter 21 Flashcards
1
Q
Terrestrial planet
A
One of the highly dense planets
2
Q
Prograde rotation
A
The counter-clockwise spin of a planet or moon
3
Q
Retrograde rotation
A
The clockwise spin of a planet or moon
4
Q
Gas giants
A
A planet that has a deep massive atmosphere
5
Q
Satellite
A
A natural or artificial body that revolves around a planet
6
Q
Phase
A
The change in the sunlit area
7
Q
Eclipse
A
An event in which the shadow of one celestial body falls on another
8
Q
Comet
A
A small body of ice
9
Q
Asteroid
A
A small, rocky object
10
Q
Asteroid belt
A
The region of the solar system that is between the orbits Mars and Jupiter
11
Q
Meteoroid
A
Rocky body that travels through space
12
Q
Meteorite
A
Meteoroid that reaches the Earths surface
13
Q
Meteor
A
A bright streak of light
14
Q
Astronomical unit
A
The average distance between Earth and the Sun.
