click below
click below
Normal Size Small Size show me how
Ch.21 vocab
Planets
Question | Answer |
---|---|
the average distance between earth and the sun | astronomical unit |
one of the highly dense planets nearest to the sun | terrestrial planet |
the counter-clockwise spin of a planet or moon | prograde rotation |
the clockwise spin of a planet or moon | retrograde rotation |
a planet with a deep massive atmosphere | gas giant |
a natural or artificial body that revolves around the sun | satellite |
a change in the sunlit area | phase |
the event when a body's shadow falls on another | eclipse |
a small body of ice, rock, and dust | comet |
a small rocky body that orbits the sun | asteriod |
a reigon between the orbits of Mars and Jupiter | asteriod belt |
meteroid | small rocky body that travels through space |
metorite | a meteroid that reaches earth without burning up completely |
meteor | a streak of light that results when a meteroid burns up in the earth's atmosphere |