Earth Science: Geology, the Environment, and the Universe

Section 1: The Milky Way Galaxy

The Milky Way

1
What is the overall shape of the Milky Way?
A)sphere
B)straight line
C)oval
D)disk

2
What is the name of the cluster that the Milky Way belongs to?
A)the Spiral Group
B)the Virgo Group
C)the Local Group
D)the Super Group

3
The Sun is __________.
A)a red giant
B)a Population 1 star
C)a Population 2 star
D)made 99.9 percent of hydrogen and helium

4
Where are the oldest stars in the galaxy located?
A)black holes
B)halo and bulge
C)spiral arms
D)bulge only

5
What are the oldest-known objects in the Milky Way?
A)active galactic nuclei
B)dwarf ellipticals
C)globular clusters
D)black holes

6
What do astronomers use to map the shape of the Milky Way?
A)visible light
B)infrared rays
C)radio waves
D)gamma rays

7
What is located at the center of the Milky Way?
A)gamma rays
B)a supermassive black hole
C)a supernova
D)gas clouds

8
How many stars are in the disk of the Milky Way?
A)the same number that you can see with your eyes on a clear night
B)1 million
C)100,000
D)100 billion

9
Where are the youngest stars of the galaxy located?
A)central bulge
B)black holes
C)halo
D)spiral arms

10
Why do variable stars pulsate in brightness?
A)gain in mass
B)expansion and contraction of their outer layers
C)constant contraction
D)movement at a fixed rate
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