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1 of 40
Term
In the symbol for Hubble type galaxy, SBc, the "B" denotes....
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The presence of a bar The number of stars in the galaxy
The size of the galaxy The color of the galaxy
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2 of 40
Term
How do we know that the universe's expansion is speeding up?
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Analyze the chemical composition Observe the movement of planets
of distant galaxies in our solar system
Measure the temperature of Look at objects from different
cosmic background radiation times in the past to see how
expansion changes
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3 of 40
Term
How did conditions differ from the present era when the universe
was young?
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, The universe was hotter, The universe was colder and
more dense, and smoother less dense than today
The universe was filled with The universe had more stars and
dark matter and energy galaxies than it does now
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4 of 40
Term
Why do stars in the halo have almost no heavy elements i.e. C, N, O?
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Halo stars are primarily composed Halo stars are formed from
of dark matter supernova remnants
Halo stars are younger than Halo stars formed before
the stars in the disk these elements were made
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