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Earth Space & Science Review

Terms in this set (15)

A key characteristic of the cloud from which the Solar System formed was its
Rotation
Planetary systems form
Within the dense disks of material surrounding very young stars
What force was responsible for triggering the formation of the solar system?
Gravity
Where does most of the matter originally present in the solar nebula end up in the solar system?
in the sun
As the solar nebula collapsed, what happened to it?
Its rate of rotation increased, it became more dense in the center, it flattened into a disk, it began to clump together
The outer planets are mostly large and gaseous because
Beyond the frost line, the gravity of large ice-rich planetesimals captured the abundant light gases
Because of the temperatures in the protoplanetary disk
Rocks and metals froze in both the inner and outer regions, and ices froze only in the outer region
As the solar nebula collapsed under its own gravity,
It heated and spun up
You are sent to find dense and rocky planets. Where in the Solar System should you look?
Close to the sun
What kind of experiment has proven most useful for finding planets around other stars
Measuring accurate Doppler shifts in the stellar spectra to detect the effects of the plants gravitational tugs on the stars motion
(relates to a kind of shift)
What happened when the gas in the central bulge of the nebula became dense enough for hydrogen to begin to undergo nuclear fusion?
The sun began to shine and it began to produce helium
How did planets begin to form in the solar nebula?
Dust and gas clumped together due to electrostatic attraction
Why does the moon have more craters than the earth?
The atmosphere of the earth burns up or slows down most meteors.
The earth's surface is mostly water, many hit the water
Erosion and volcanic activity will erase or disguise many craters within a few years to a few centuries
The planets in our solar system are thought to have come from
The same cloud of gas and dust in which the sun formed
As the solar nebula collapsed, it became a disk because
The overall rotation of the nebula plus collisions between particles made the particles go in more or less the same direction
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