1. Pop-quiz #1 Which of the following statements is TRUE:
Einstein first postulated the constancy of the speed of light with his general theory of relativity
The equivalence of mass and energy is best expressed through the formula: E = mc2
Gravitational redshift is a feature of the special theory of relativity
The principle of equivalence which equates gravity to an accelerated frame of reference is the basis of the special theory of relativity

2. Pop-quiz #2 Which of the following statements is FALSE:
Wien’s law states that the temperature of a black body and the wavelength of peak radiation bear an inverse relation to each other
The luminosity of a black body is proportional to its temperature raised to the fourth power
Atoms are capable of absorbing and re-emitting photons
The energy of a photon is given by the formula: E = mc2

3. Pop-quiz #3
Which of the following statements most accurately describes what happens when a star evolves from LEFT to RIGHT along a HORIZONTAL LINE in a HERTZSPRUNG-RUSSELL DIAGRAM:
It’s temperature and radius both increase
It’s temperature increases, but it’s radius decreases
It’s temperature decreases, but it’s radius increases
It’s temperature and radius both decrease

4. Pop-quiz #4
Which of the following statements most accurately describes what happens when I HOLD A PIECE OF CHALK IN MY HAND:
A gravitational force and an electromagnetic force are canceling each other
Only a gravitational force is acting on the piece of chalk
Only an electromagnetic force is acting on the piece of chalk
A gravitational force and a strong nuclear force are canceling each other

5. Pop-quiz #5
Which of the following statements comparing our Sun to another star X located at the outer edge of the Milky Way galaxy is TRUE:
They have the same orbital period around the center of our Galaxy
Star X takes a longer time than the Sun to orbit the Galaxy’s center
The Sun takes a longer time than Star X to orbit the Galaxy’s center
Star X and the Sun are at the same distance from the center of the Milky Way