7. Dark Matter Quiz
7. Dark Matter Quiz
Introduction
1. Why can't we see dark matter directly?
a) It's hidden behind stars.
b) It doesn't emit light
c) We can see it directly.
d) We don't have the technology to know it's even there.
2. Even though we can't see it, we know dark matter exists. How?
a) Some lucky guesses.
b) Sometimes it lights up, but only occasionally.
c) Because of Hubble's law.
d) It affects the gravity of other bodies in the universe.
History of Dark Matter
3. Who discoverd dark matter?
a) Zwicky
b) Einstein
c) Rubin
d) Milgrom
4. What exactly did Vera Rubin discover?
a) nothing
b) Newton's laws
c) That stars at the edge of a galaxy orbit faster than ones near the center.
d) That stars at the edge of a galaxy orbit at basically the same speed as ones near the center.
5. When did the main discoveries relating to dark matter come about?
a) the 19th Century
b) the 20th Century
c) the Golden Century
d) the 20th Century Fox Studios
MACHOs
6. What does MACHO stand for?
a) Mighty Alien Creating Hot Object
b) Massive Compact Halo Object
c) My Aunt Cooks Heavenly Oysters
d) All of the above
7. What is a Brown Dwarf?
a) A brown star
b) A very bright star
c) A huge explosion
d) A small star that does not emit light
8. This object has such a strong gravitational field that not even light can escape. What is it?
a) Neutron Star
b) Brown Dwarf
c) Black Hole
d) A Bright Star
9. What possibilities does black holes offer?
a)Blowing up the universe
b)Time Travel
c)Transportation to different parts of the universe
d)Both B and C
10. This star is unique because it is mostly made up of neutrons?
a)Neuclear Star
b)Neutron Star
c)Newton star
d)None of the above
Nonbarynoic Candidates
11. "WIMP" is an acronym for:
a) Weird Interstellar Motionary Planet
b) Weakly Interacting Massive Particle
c) White Incandescent Molecular Projection
d) Wonderfully Invisible Meson Photograph
e) Wilbur-Intermediate Millikan Prototype
12. Which of these is not a kind of neutrino?
a) electron-neutrino
b) tau-neutrino
c) muon-neutrino
d) omega-neutrino
13. Neutrinos and other similar particles can be detected with what instrument?
a) scintillator
b) odometer
c) spectrometer
d) thermometer
e) electron microscope
14. Where is the best environment to detect neutrinos, LSPs, and other WIMPs?
a) under the oceans and large bodies of water
d) in laboratories
c) underground and beneath mountains
d) outer-space
e) in a plane in Earth's atmosphere, travelling at the speed of sound
15. The neutralino interacts with matter only through which force?
a) strong force
b) electromagnetic force
c) weak force
d) dark force
e) gravitational force
Galaxy Rotation Curves and Mass Accounting
16. What is a galaxy?
a) a group of asteroids
b) a group of planets
c) a group of stars
d) a group of comets
17. Which part of a galaxy rotates?
a) the stars inside and the galaxy itself
b) only the stars
c) only the galaxy
18. We think there is dark matter inside what part of a galaxy?
a) the stars
b) the halo
c) the orbit
d) the center
19. The halo of a galaxy and the luminous matter in a galaxy rotate _________ ?
a) at different speeds
b) at the same speed
c) to the right
d) to the left
Posted by hsutherl on April 24, 2005 at 12:49 AM