154 • Name:

Words

antimatter     bananas         big bang        big rip
black holes    electromagnetic galaxies        gravitational 
mass           protons         quarks          rotation
strong nuclear                 weak nuclear 

1. Atoms are made up of electrons, neutrons, and ______________.
2. Electrons are very very small. Electrons are so small that they effectively have no inside. Protons and neutrons are larger. Protons and neutrons are made up of ____________.
3. The positron is the opposite of the electron. The positron has the same size and mass as the electron, but the opposite charge. The positron is made of matter which also the opposite of the matter from which an electron is made. When a positron and electron collide, they annihilate each other. The positron is an example of ______________________.
4. There are only four forces. The four forces are:
   • __________________________
   • ______________________________
   • ____________ ______________
   • ________ ______________
5. The Higgs boson would provide an explanation of why matter has ________.
6. Vera Rubin studied the rotation speed of ________________.
7. In Vera Rubin's study did stars farther from the center orbit more slowly as predicted by Newton's laws? ____
8. When Carlos Frenk ran computer simulations of the universe, galaxies failed to form until dark matter was:
   1. removed
   2. one fifth the amount of visible matter
   3. equal to the amount of visible matter
   4. five times the amount of visible matter
9. Does dark matter interact with itself? _____
10. Saul Perlmutter was studying the rate of expansion of the universe. Perlmutter found that the universe is...
    1. ... expanding at a rate that is decreasing over time
    2. ... expanding at a constant rate over time
    3. ... expanding at a rate that is increasing over time
11. Phantom energy is a hypothetical form of dark energy that is even more potent than the cosmological constant at increasing the expansion of the universe. The remarkable feature is that phantom energy possesses a negative kinetic energy. If it exists, it could cause the expansion of the universe to accelerate so quickly that a scenario known as the ______ ______ would occur.
12. Does a site swap throw of 3 land in the same hand or the other hand?
13. Use arrows to trace the path for the "balls" below for the site swap equation 3 and 51

3:  •   ◦   ❖
   ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ 
    R   L   R   L   R   L   R   L   R   L   R   L   
	 
	 
	 
	
51: •       ◦      ❖
   ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ 
    R   L   R   L   R   L   R   L   R   L   R   L