Atoms are neither empty nor solid balls. What are they?
Protons and neutrons are made of ____________________.
__________________ Some potassium-40 decay processes produce positrons, the antimatter particle partner to an electron. What "Go local" food contains potassium-40 and thus antimatter?
___________________ There are four forces: the strong force, the weak force, the electromagnetic force, and the force of gravity. For which of these four forces would the Higgs boson provide an explanation?
Vera Ruben studied the rotation rate of stars around the centers of galaxies. According to Newton's theory of gravitation, stars closer to the center of the galaxy should be moving more rapidly around the center of the galaxy than stars farther out from the center. Is that what Dr. Rubin found, and if not, what did she find to be true?
Carlos Frenk discovered that without dark matter, computer simulations of the universe did not form galaxies. For galaxies to form, Frenk found which of the following to be true:
(a) Dark matter had to be one fifth the mass of visible matter.
(b) Dark matter had to be equal to the mass of visible matter.
(c) Dark matter had to be five times the mass of visible matter.
The Soudan mine dark matter experiment searched for dark matter particles called ____________________.
________ Does dark matter interact with itself?
More recent research has revealed the existence of dark energy. Dark energy is an unknown source of energy that is causing the universe to expand faster and faster. In the phantom energy theory dark energy will eventually rip the universe apart in an event called the "Big Rip." When will the Big Rip happen?
(a) Before final examinations (b) This summer (c) Within your lifetime (d) Billions of years from now
_____ Is the site swap equation 334233 true? That is can the sequence be juggled?
_____ Is the site swap equation 252525 true? That is, can the sequence be juggled?
On the back:
Sketch two hands. Draw three balls.
Use arrows to draw a site swap 3 cascade pattern.
Sketch two hands. Draw three balls.
Use arrows to draw a site swap 51 shower pattern.
