Earth Science Geology, the Environment, and the Universe

Section 3: Cosmology

Self-Check Quizzes-English

1
What do scientists use to measure Earth's distance from globular clusters?
A)variable stars
B)the steady-state theory
C)the Hubble constant
D)the Milky Way
2
Is the rate of the universe expansion speeding up or slowing down?
A)It was slowing down, but now it is speeding up.
B)It has always been slowing down.
C)It was speeding up, but now it is slowing down.
D)It has always been speeding up.
3
What theory does cosmic background radiation support?
A)the steady-state theory
B)the inflationary universe model
C)the theory of evolution
D)the Big Bang theory
4
Look at the scale in the figure. Infer why our sun will never become a black hole.
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A)it's too small
B)it's not in the center of a galaxy
C)it's too big
D)it has too much gas
5
In the Big Bang theory, what balances the momentum of the expansion of the universe?
A)the inward force of gravity
B)the momentum of the galaxies
C)the outward force of gravity
D)the critical density of the universe
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