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Name__________________________
Miss Fry
PHYSICS
SPRING SEMESTER REVIEW SHEET
MAGNETIsm, electricity, heat, and nuclear topics!
Magnetism
1. What is a magnet?
2. Like poles _____________, and opposite poles _____________.
3. If given a picture, be able to explain what poles are where, based on their attraction or
repulsion for other objects. (like pages 564 and 565)
4. How is a magnet formed? (What happens on the subatomic level?)
5. Can you make a magnet that has two north poles (or two south poles)? Why or why not?
6. What are naturally-found magnetic rocks called?
7. How can you make something into a temporary magnet?
8. How does an electromagnet work? (hint: current carrying wire)
9. Is the Earth itself a magnet? Why does a compass point northward?
10. Name a possible reason for Earth’s magnetic field.
11. Has the Earth’s magnetic field been stable forever and ever? Explain.
12. What would happen if the Earth no longer had a magnetic field?
Electricity
1. What is an electric current? (definition)
2. What is an electric circuit? (definition)
3. What is current measured in? Resistance? Power? Potential Difference?
4. What is a parallel connection? What is a series connection? (definition or explanation)
Name__________________________
Miss Fry
5. A parachutist falls into one power line. Is he electrocuted? Why or why not? What if
the parachutist is touching both the ground and the line at the same time? Explain.
Finally, what if the parachutist is touching two different lines at the same time? Explain.
6. What is the third prong of the outlet for?
7. Why did Mom always tell you not to touch something that is plugged in with wet hands?
8. If a string of Christmas lights was wired to be a series circuit, and one of the lightbulbs
burned out, what would happen to the rest of the bulbs? What would happen if it was
wired in parallel?
9. What type of wiring (series/parallel) is our home, and how do we know?
10. Be able to work problems, such as:
a. A lamp is labeled 6V and has a resistance of 3ohms. What current flows through
the lamp when it is operating?
b. The current through an alarm clock connected to a 120V source is 2.08A. How
much power does the clock use? (hint: use P=IV)
c. A current of 3A flows through a resistor when it is connected to a 12V battery.
What is the resistance of the resistor?
d. A toaster has a resistance of 12 ohms when hot; what current will flow through it
when it is connected to 125V?
e. A 50V battery is connected in series to two lamps with resistances of 125 ohms
and 225 ohms, respectively. Find the total resistance. Find the current in the
circuit. Find the potential difference across the 125 ohm lamp. Draw the
schematic for this circuit, and label the items with their numbers.
f. Three 35 ohm, 55 ohm, and 85 ohm resistors are connected in parallel. The three
resistors are then connected to a 35V battery. What is the equivalent resistance?
What is the current through each resistor? Draw this schematic.
g. A 110V household circuit that contains a 1800W microwave, a 1000W toaster,
and an 800W coffeemaker is connected to a 20A fuse. Will the fuse blow (melt)
if the microwave and the coffeemaker are on at the same time? How about if the
toaster and the coffeemaker is on at the same time? (Hint: use the equation P=IV
to determine the I for each device, then add them together to see if they exceed
the fuse’s rating)
11. Be able to look at a schematic, and state what is going on (include whether in series or
parallel).
Name__________________________
Miss Fry
Heat Unit
1. What is the definition of temperature? Heat? What is the difference between them?
2. Know that matter does not contain heat. Heat is energy in transit from a body of higher temp to
a body of lower temp. (see page 309)
3. What is thermal equilibrium?
4. What is a calorie, a kilocalorie, and a Calorie?
5. What is specific heat?
6. Why can you touch an aluminum pan soon after it has been taken from the oven, but you’ll burn
your fingers if you touch the food inside the pan? (pg 313)
7. Which would you rather touch, an empty frying pan that has been on a hot stove for 1 minute,
or a frying pan that has water in it (that has been on a hot stove for 1 minute also)? Why?
8. Why does the high specific heat of water make a difference in the climate of the coastal areas?
9. Explain why the metal ball could fit through the ring before heating, but not after.
10. Why would a telephone cable worker need to leave some sag in the wires he/she is hanging
during the summer?
11. Why do lakes freeze from the top down rather than from the bottom up?
12. What is conduction? Convection? Radiation?
13. Does a warm blanket provide you with heat….or does it simply trap your body heat? Explain.
14. Make sure you know the big ideas and how they might relate to different situations:
a.
b.
c.
d.
e.
f.
Temperature and heat are not the same thing.
Matter does not contain heat.
Not everything absorbs heat like other things. (specific heat)
Heat is transferred in various ways. (conduction, convection and radiation)
Temperature is a measure of Kinetic Energy.
Thermal energy will become more spread out over time (will come to equilibrium)
Name__________________________
Miss Fry
Nuclear Topics
1. Summarize briefly the China Syndrome movie.
2. Number of protons equals the ______________________, unless it is an ion.
3. Do the number of neutrons have to equal the number of protons? Explain.
4. Which nucleons are in the nucleus? Which are outside of the nucleus?
5. What makes the mass of an atom?
6. A lone neutron will decay into ____________________________.
7. What are the three types of radioactive decay? Explain them a little. What stops each of
them?
8. What is an isotope?
9. All isotopes above ___________ are radioactive.
10. What is an isotope of Carbon?
11. Radioactive decay is measured in ________________________. Explain what that is.
12. The changing of one element to another is called _________________________.
13. Explain how Carbon-14 is used to figure out how old something (that is dead) is.
14. What is used to figure out how old something is if it was never alive?
15. What is a radioactive tracer? Explain its purpose.
16. If you are exposed to moderate to extreme amounts of radiation, what all can happen to
you?
17. If the radioactive half-life of a certain isotope is 1620 years, how much of that substance
will remain at the end of 1620 years? After 3240 years?
18. What happens to the atomic number of an atom when it ejects an alpha particle?
19. What happens to the atomic number of an atom when it ejects a beta particle?
20. Why are there deposits of lead in all deposits of uranium ore?
21. What is the difference between fission and fusion? (explain both)
22. What is a chain reaction?
Name__________________________
Miss Fry
23. Why do chain reactions not occur in naturally occurring uranium-ore deposits?
24. Explain how a nuclear fission bomb is created. (pg 632)
25. What are the three main components of a nuclear reactor? (pg 633)
26. What is the purpose of the control rods in a nuclear reactor?
27. When fission occurs, the total mass of the fission fragments is less than the mass of the
fissioning nucleus. What happens to that missing mass? (pg 643)
28. What gets fused together in nuclear fusion, and what results?
29. Why are there no large deposits of plutonium in Earth’s crust?
30. Which isotope of Uranium is most common? Which isotope of uranium will undergo
fission?
 Remember to write down all work you do on your problems for partial
credit. If you happen to punch it in to your calculator incorrectly, I can
then give you partial credit for at least setting up the problem correctly.
 Bring your own calculator!!
 You can use your notecard!