VERSION A

Write your name at the top of this quiz as well as on your answer sheet. WRITE YOUR VERSION ON YOUR ANSWER SHEET. Feel free to write or draw on the quiz. You may use the Periodic Table of elements posted on the wall if needed.

Please put away all electronic devices. No calculators will be allowed for this quiz.

CHOOSE THE BEST ANSWER FOR EACH PROBLEM.

1. Which of the following types of light have wavelengths shorter than visible light?
a) radio and infrared.
b) X-Rays and infrared.
c) gamma rays, radio, and UV.
d) UV, gamma ray, and X-ray.
e) Radio and X-ray.

d) UV, gamma ray, and X-ray.

2. The filament in Light Bulb A has a temperature that is twice that in Light Bulb B, in the Kelvin scale. Therefore:
a) The wavelength of the peak of the spectrum of Bulb A is two times that of Bulb B
b) The wavelength of the peak of the spectrum of Bulb A is 1/2 that of Bulb B
c) The wavelength of the peak of the spectrum of Bulb A is the same as that of Bulb B
d) The wavelength of the peak of the spectrum of Bulb A is four times that of Bulb B
e) The wavelength of the peak of the spectrum of Bulb A is 1/4th that of Bulb B

b) The wavelength of the peak of the spectrum of Bulb A is 1/2 that of Bulb B

3. Star A and Star B have the same radii, but the temperature of the photosphere of Star A (in Kelvin) is twice that of Star B, in the Kelvin scale. The luminosity of Star A is:
a) The same as that of Star B.
b) Twice that of Star B.
c) Four times that of Star B.
d) Sixteen times that of Star B.
e) One half that of Star B.

d) Sixteen times that of Star B.

4. Which of the following is true about neutrinos?
a) they are negatively charged.
b) they are about the same mass as a proton.
c) they are anti-electrons.
d) they rarely interact with normal matter, so can fly straight out of the Sun once they are produced.
e) they are about 2000 times more massive than protons.

d) they rarely interact with normal matter, so can fly straight out of the Sun once they are produced.

5. Proxima Cen has a photospheric temperature (in Kelvin) which is about half that of the Sun. The wavelength of the peak of the spectrum of Proxima Cen is therefore:
a) Two times that of the Sun.
b) One half that of the Sun.
c) Four times that of the Sun.
d) One quarter that of Sun.
e) The same as that of the Sun.

a) Two times that of the Sun.

6. The lower atmosphere of the Sun is called the:
a) The radiative zone.
b) The chromosphere.
c) The convective zone.
d) The corona.
e) The core.

b) The chromosphere.

7. If the parallax of Star A is three times larger than the parallax of Star B, the distance to Star A is:
a) three times further than the distance to Star B.
b) nine times further than the distance to Star B.
c) 1/3rd of the distance to Star B.
d) 1/9th the distance to Star B.
e) the same as the distance to Star B.

c) 1/3rd of the distance to Star B.

8. If you were in a spacecraft orbiting the Sun at a distance of 3 A.U., how bright would the Sun appear to you compared to an observer on the Earth?
a) 1/3rd as bright.
b) 1/9th as bright.
c) the same brightness.
d) 3 times brighter.
e) 9 times brighter.

b) 1/9th as bright.

9. The temperature 273K is equal to:
a) absolute zero.
b) the boiling point of water.
c) the freezing point of water.
d) 212 degrees Fahrenheit.
e) the photospheric temperature of the Sun.

c) the freezing point of water.

10. Which of the following is a unit of angle?
a) Hertz.
b) Joule.
c) arcminute.
d) Watt.
e) Angstrom.

c) arcminute.

11. When an electron in an atom jumps from a higher energy level to a lower energy level, the atom:

a) emits a photon of light.
b) absorbs a photon of light.
c) becomes excited.
d) becomes ionized.
e) becomes an isotope.

a) emits a photon of light.

12. A ³He atom contains:
a) 3 protons, 3 neutrons.
b) 1 proton, 1 neutron.
c) 1 proton, 2 neutrons.
d) 3 protons, 0 neutrons.
e) 2 protons, 1 neutron.

e) 2 protons, 1 neutron.

13. A Hertz is:
a) A unit of wavelength.
b) A unit of energy.
c) A unit of mass.
d) A unit of luminosity.
e) A unit of frequency.

e) A unit of frequency.

14. The density of iron is about 8 g/cm³, and the density of water is 1 g/cm³. What is the density of the core of the Sun, where the nuclear reactions occur?
a) 1.4 g/cm³.
b) 10^-3 g/cm³.
c) 100 g/cm³.
d) 0.1 g/cm³.
e) 5.5 g/cm³.

c) 100 g/cm^3.

15. A Light Year is:
a) The same thing as an Astronomical Unit.
b) About 63,000 A.U.
c) About 3.26 A.U.
d) The same thing as a parsec.
e) The distance from the Earth to the Sun.

b) About 63,000 A.U.

16. Using the Periodic Table on the wall, determine what a ¹³C atom contains.
a) 6 protons, 13 neutrons.
b) 7 protons, 6 neutrons.
c) 13 protons, 13 neutrons.
d) 13 protons, 0 neutrons.
e) 6 protons, 7 neutrons.

e) 6 protons, 7 neutrons.

17. Granules, the small-scale variations in the brightness of the photosphere of the Sun, are:
a) places where meteorites have recently smashed into the Sun.
b) the tops of convective cells in the Sun.
c) the same thing as sunspots.
d) caused by shadows of the moons, planets, and asteroids in the inner solar system.
e) nuclear reactions occuring just below the photosphere of the Sun.

b) the tops of convective cells in the Sun.

18. The formula b = L/(4*pi*D²) is called:
a) Wien's Law.
b) Stefan's Law.
c) The parallax law.
d) The Inverse Square Law of Light.
e) Einstein's Law.

d) The Inverse Square Law of Light.

19. The first step in the proton-proton chain produces deuterium (²H). What does the second step produce?
a) ³He.
b) ³H.
c) ¹²C.
d) ¹H.
e) ¹⁴C.

a) ³He.

20. The wavelength of orange light is 6 X 10^-7 meters, and the speed of light is 3 X 10⁸ meters/sec. What is the frequency of orange light?
a) (3 X 10⁸)/(6 X 10^-7)
b) (3 X 10⁸) X (6 X 10^-7)
c) (6 X 10^-7)/(3 X 10⁸)
d) (3 X 10⁸) X (3 X 10⁸)/(6 X 10^-7)
c) (6 X 10^-7) X (6 X 10^-7)/(3 X 10⁸)

a) (3 X 10⁸)/(6 X 10^-7)