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Astronomy Exam Unit 3

Terms in this set (97)

From what are secondary craters made from
Ejecta "volcanism"
Choose a statement that gives an example of comparative planetology
The study of planets by compairing and contrasting the basic physical characteristics.
What is the small peak found in some meteor craters
Central Peak
Rays and secondary craters are created by __________ when craters are formed during a collision
Ejecta
Rocks less than 100 meters in diameter are called ________ when they are in space
Meterorides
Space rocks less than 100m in diameter, when they hit the ground are called
Meteorites
space rocks less than 100m in diameter, when they burn up in the atmosphere are called
meteor
to survive passage through earths atmosphere without burning or breaking up before it hits the ground an asteroid must be
meteorites
which of the following is a factor that explains earths lack of craters compared to the moon
wind erosion, and plate tectonics
based on the number of impact craters observed per square meter on their surface, place these terrestrial planets (Earth, Mercury, Venus) in order from youngest to oldest surface
earth, Venus, mercury
according to studies of impact cratering which of these terrestrial objects has on average the oldest surface.
moon
impacts on the terrestrial planets and the moon
are less common than they used to be
scientist propose an early period of heavy bombardment in the solar system because
the moon is heavily createred
flows of material surrounding Martin craters suggest
the presence of water in surface rocks
If a radioactive element has a half-life of 10000 years what fraction of it is left in a rock after 40,000 years.
1/16
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