Astronomy Test Study Guide

Which of the following supports the idea of dark matter?

• Many instances of detected WIMPS

• Dark blobs seen around galaxies.

• Lensing of light around galaxy clusters.

Dark matter is:

• invisible

• made of atoms

• listed on the Periodic Table

• shiny, like stars

The Milky Way is a___.

• galaxy

• star

• planet

• moon

Dark Matter is made up of something ___.

• smaller than atoms

• larger than atoms

How do astronomers map the distribution of Black Matter in the Universe?

• x-ray detector

• gravitational lensing

• metal detector

• ruler

What percent of the Universe is made of DARK MATTER?

• 27%

• 15%

• 10%

• 5%

Dark matter is a theoretical substance. What does this mean?

• Scientists have simply guessed that it exists

• There is evidence for its existence, but it hasn't been proven

• Scientists are certain that it exists

• Scientists are split 50/50 over whether it exists or not

What caused Fritz Zwicky to come up with the theory of dark matter?

• He saw a galaxy cluster moving away from earth at a rapid rate of speed

• He saw a galaxy cluster moving toward earth at a rapid rate of speed

• He saw a galaxy cluster breaking apart at a rapid rate of speed

• He saw that galaxy clusters were gravitationally bound even though they didn't appear to have enough mass to do so.

How would dark matter be different from the stars and planets we can see?

• It wouldn't reflect light

• It wouldn't emit radiation

• It wouldn't interact with the electromagnetic spectrum

• All of these

Who found out that galaxies are moving away from us and the universe is expanding?

• Arno Penzias

• Edwin Hubble

• Henrietta Swan Leavitt

• Robert Wilson