Deck 79: Dark Matter

Question 1

A large galaxy is essentially

A) a small amount of normal matter uniformly mixed with a large amount of dark matter.
B) a central mass of dark matter surrounded by a small amount of normal matter.
C) a large amount of normal matter surrounded by a diffuse halo of a small amount of dark matter.
D) a small amount of normal matter embedded in a halo of a large amount of dark matter.

Answer 1

a small amount of normal matter uniformly mixed with a large amount of dark matter.

Question 2

Dark matter may be composed of this particle:

A) WIMP
B) MACHO
C) neutrinos
D) neutrons

Answer 2

WIMP

Question 3

The halo of our galaxy may have these large objects in it to account for dark matter:

A) WIMP
B) MACHO
C) neutrinos
D) neutrons

Answer 3

MACHO

Question 4

The approximate amount of dark matter in our galaxies' halo is _____ times more than our visible matter.

A) 2
B) 5
C) 10
D) 20

Question 5

Vera Rubin found the rotational velocities as you move away from the core of a galaxy show a
_________________________________.

Question 6

The most direct way to see dark matter is by observing the ____ of spiral galaxies.

Question 7

The dark matter halo of our galaxy is about 2 times the visible matter.

Question 8

Special relativity is the study of gravity.