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31 Cards in this Set
- Front
- Back
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a redshift in the light of a star or galaxy indicates that the object is
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moving away
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a blueshift in the light of a star or galaxy indicates that the object is
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moving towards
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What is the name of the theory that explains how the universe formed
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Big Bang Theory
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List three items of evidence that support the Big Bang Theory
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1. The universe is still expanding
2. Cosmic background radiation 3. 25 percent of the total mass is helium |
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what type of galaxy is the Milky Way galaxy
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Barred Spiral
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What property does the color of a star tell us
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How hot it is
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Which Stage of a star's life is the longest
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Main sequence
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The primary process by which stars produce energy a
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Nuclear fusion
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What happens to a white dwarf as it goes on all the time what does it become
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Black dwarf
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What does heliocentric mean
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revolving around the sun
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The object is at 4 km long irregularly shaped and made of rock what is it
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An asteroid
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smallest to largest:
milkyway galaxy universe local group solar system earth |
earth
solar system milky way local group universe |
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as the nebula swirls and a protostar forms, which force causes the atoms and molecules in the nebula to be attracted to one another and contract
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gravity
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a star maintains its size due to the balance of __________ pulling in on the star and _______________ pushing out on the star
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gravity
nuclear fusion |
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a main sequence star will stay a stable size aslong as it has enough _____________ to burn in nuclear fusion.
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hydrogen
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What property does the color of a star tell us
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How hot it is
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What stage of a star's life is the longest
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Main sequence
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The primary process by which stars produce energy is
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Nuclear fusion
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What happens to a white dwarf as it cools down over time what does is it become
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Black dwarf
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What do we call a theory on how the solar system formed
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Nebula theory
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According to this theory scientists believe that the solar system originated from
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Nebula
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what does heliocentric mean
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Sun centered
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list terrestrial planets in order
list gas giants in order |
terrestrial: B,C,D,E,
gas giants: F,G,H,I,J |
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terrestrial planets are more/less dense than Jovian planets
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more
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terrestrial planets are smaller / larger than jovian planets
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Smaller
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How many stars are present in our solar system
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one the Sun
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This object is at 84 kilometers long irregularly shaped and made a rock what is it
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asteroid
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As Earth revolves around the Sun in its orbit which of the following is true
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A. The Earth's axis always points towards the Sun
B. The Earth's axis always points in the same direction parallel to itself at all positions on the orbit C. Earth's axis points towards the center of the Milky Way galaxy |
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What causes the seasons on the earth
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Tilt
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what is the ultimate cause of high tides (or any tides) on earth
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moons gravity
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what do we call the theory that describes our current view of how the moon formed
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nebular theory
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