2.11 Quiz 3
Unlock all answers in this set
Unlock answersquestion
The origin, structure, and future of the universe
answer
Cosmologists study _______.
question
Dark matter
answer
Astronomers have proposed the existence of an unexplained force that is causing the expansion of the universe to accelerate. What do they call this force?
question
What came before the big bang
answer
What is one of the primary unanswered questions about the origin of the universe?
question
Spiral
answer
A galaxy whose stars are arranged in a disk with arms that surround a central bulge is a ________ galaxy.
question
From collisions between other galaxies
answer
Most irregular galaxies are thought to have formed ________.
question
- irregular - elliptical - spiral
answer
What are the basic shapes into which astronomers classify most galaxies?
question
Continue to expand and cool forever
answer
At present, scientists expect the universe to _______.
question
Have liquid water
answer
In looking for other planets that might have life, astronomers focus especially on finding planets that ________.
question
Local
answer
The Milky Way is located in the ________ Group.
question
Did early life arise spontaneously or did it come from space?
answer
Which of the following is an unanswered question about life on Earth?
question
Matter
answer
Unexpected orbital velocities of stars around the centers of galaxies led astronomers to predict the existence of dark _______.
question
Stars symmetrically dispersed in a spherical or flattened shape
answer
An elliptical galaxy has _______.
question
Barred spiral
answer
The Milky Way is a ______ galaxy.
question
Cluster
answer
The least common shape for a galaxy is ________.
question
The Milky Way will collide with Andromeda in 3 billion years forming an elliptical galaxy
answer
What do astronomers expect will eventually happen to the Milky Way galaxy?
