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Teacher Key
Testing Your "Solar Smarts"
Part 1: Matching: Match the term to its description provided on the right.
____F____ 1. Photon A. The ability to convert light into electricity at the atomic level. This
electrophysical property allows for solar panels to work
____C____ 2. Conductor B. The positively charged electrode of battery that receives electrons, supplying current.
____E____ 3. Semiconductor C A material which permits the flow of electric charges in one or more directions
____D____ 4. Insulator D. A material whose internal electric charges do not flow freely,
and therefore does not conduct an electric current.
____G____ 5. Anode E. Materials that have properties in-between insulators and conductors,
allowing electrical conductivity in varying degrees
____B____ 6. Cathode F. A "packet" of solar energy of a particular wavelength
____A____ 7. Photovoltaic Effect G. The negatively charged (electron supplying) electrode of
a device supplying current such as a battery
Part 2: True or False: Write "True" or "False" in the blank provided to the left.
______TRUE_______ 8. The silicon in a photovoltaic cell is 'doped' with phosphorus and boron in order to
resist the flow of electrons in the semiconductor
______TRUE_______ 9. The number of electrons in an atom's outer shell (the valence electrons) determine
how the atom make bonds with other substances.
______TRUE_______ 10. The number of electrons in an atom's outer shell (the valence electrons) determine
whether or not the atom tends to gain or lose electrons.
______TRUE_______ 11. Silicon that has phosphorus mixed in with it will be electrically more negative.
______TRUE_______ 12. Silicon that has boron mixed in with it will be electrically more positive.
______FALSE_______ 13. The top layer in a photovoltaic cell is the positive terminal (cathode) while the
bottom layer of the photovoltaic cell is the more negative layer (anode).
Sunshine in a Jar:
Do-It-Yourself Outdoor Garden Lanterns (continued)
