Download ANSWER SHEET for SHORT CIRCUITS SCIENCE OLYMPIAD IT`S

ANSWER SHEET for SHORT CIRCUITS
SCIENCE OLYMPIAD IT’S ELEMENTARY
MAY 22ND , 2010
A.
1. _____
2. _____
3. _____
B.
4. _____
5. _____
6. _____
C.
7-8. Tape your wire here _________________________________________________
D.
9. _________________
10. ._________________
11. _________________
12. _________________
13. _________________
14. _________________
15. _________________
16. _________________
E.
17.
F.
G.
18.
20.
21.
22.
23.
24.
_________
_________
_________
_________
_________.
.
25.
26.
27.
28.
29.
30.
31.
32.
33.
_________
_________
_________
_________
_________
_________
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19.
NOTE! YOU MAY KEEP A COPY OF STATION F
QUESTIONS AND CONTINUE TO WORK ON UNTIL
THE END OF THE EVENT!
34.
35.
36.
37.
38.
_________
_________
_________
_________
_________
Names of Competitors __________________________________
School Team __________________________________________
H.
39.
40.
41.
42.
43.
44.
45.
ANSWER SHEET for SHORT CIRCUITS
SCIENCE OLYMPIAD IT’S ELEMENTARY
MAY 22ND , 2010
_______________
_______________
_______________
_______________
_______________
_______________
_______________
I.
46.
47.
48.
49.
_____
_____
_____
_____
J.
50 -55
K.
56.
(second tie-breaker)
57. Total voltage = ___________
L.
58.
59. Total voltage = _____________
Show work on sheet provided. (1st tie breaker and bonus!)
Names of Competitors __________________________________
School Team __________________________________________
Short Circuits
Station B
Questions About Bulbs and Batteries in Circuits
1. Two identical bulbs, A and B, are connected in series to a single D-cell
battery. The same bulbs are then connected in parallel to the same D-cell
battery. Which statement below best describes the brightness of the bulbs in
the circuits?
A. Bulbs A and B will be brighter in the parallel circuit.
B. Bulbs A and B will be brighter in the series circuit.
C. Bulbs A and B will be the same brightness in either the series or parallel circuit.
2. Imagine a circuit with a 1.5 volt battery and one bulb. Imagine a similar
circuit with a 3.0 volt battery and two bulbs connected in series. Which
circuit has the brighter bulbs?
A. Circuit with 1.5 volt battery and one bulb.
B. Circuit with 3.0 volt battery and two bulbs.
C. Bulbs in both circuits are at the same brightness levels.
3. As you add more light bulbs in parallel with a battery of constant voltage,
what happens to the brightness of each bulb?
A. Each bulb gets dimmer.
B. Each bulb gets brighter.
C. Each bulb will have the same brightness.
Short Circuits
Station B
Questions About Bulbs and Batteries in Circuits
4. Which circuit will drain the battery the quickest?
A. Series circuit with one bulb and one battery.
B. Series circuit with two bulbs and one battery.
C. Parallel circuit with two bulbs and one battery.
5. Why is a bulb brighter when it is powered by two batteries rather than one
battery?
A. Because the flow of electric current in the circuit is less.
B. Because the flow of electric current is the same.
C. Because the flow of electric current is more.
6. What is the effect of changing the wire in a circuit from a straight thick
wire to a straight thin wire of the same length?
A. Bulbs become dimmer.
B. Bulbs become brighter.
C. Bulbs remain the same level of brightness.
Short Circuits
Station C
Wire Stripping
7 and 8. Take one piece of wire from the bag and strip approximately
1 cm from EACH end of the wire using the wire stripper provided.
Use the scotch tape provided to tape the wire in the appropriate box on
your answer sheet.
Scoring: + 1 point for correctly stripping each end of the wire.
Short Circuits
Station D
Schematic Diagram Symbols
Identify the following symbols commonly found on schematic diagrams.
Short Circuits
Station E
Lighting a Light Bulb
Draw three ways you can light a light bulb using only one D-cell battery,
one piece of wire (stripped on both ends) and one small light bulb.
(You may use the materials supplied to help answer this question).
17. Here is one way ….
18. Here is another way …
19. Here is another way …
Short Circuits
Station F
General Questions about Circuits and Electricity
Electricity: in each set, circle the Odd One Out and explain why it does not fit
with the others. (NOTE! – you may continue to work on this sheet at any time
during the event.)
Which is the Odd One?
20.
D cell battery
Filament
Metal jacket
Electrical tip
Why it is the Odd One Out?
Which is the Odd One?
21.
Rubber eraser
Plastic paper clip
Copper penny
Wood ruler
Why it is the Odd One Out?
Which is the Odd One?
Why it is the Odd One Out?
Which is the Odd One?
Why it is the Odd One Out?
Which is the Odd One?
Why it is the Odd One Out?
22.
Heat
Sound
Light
Color
23.
Battery
Switch
Wire
Bulb
24.
A
G
C
D
Short Circuits
Station G
Electrical Terms and Vocabulary
Match the following terms with their definitions:
25. Circuit
A. energy caused by the flow of electrical charges
26. Electric Motor
B. a circuit in which the current must flow through each
electrical device in order to complete the circuit
27. Conductor
C. a complete path that electricity can flow through
28. Current Electricity
D. a broken or incomplete path that electricity cannot
flow through
29. D-Cell
E. property of a material through which electricity has
difficulty flowing
30. Electricity
F. device that keeps too much electric current from
flowing through wires
31. Grounded
G. a material through which heat or electricity flows
easily
32. Insulator
H. a circuit in which each electrical device is
independently connected to the electrical source
33. Open Circuit
I. device that can open or close an electrical circuit
34. Parallel Circuit
J. a battery that changes chemical energy into electrical
energy
35. Resistance
K. device that changes electrical energy into mechanical
energy
36. Series Circuits
L. when an electrical charge flows into the ground or
surface of the earth
37. Fuse
M. a moving electrical charge
38. Switch
N. a material through which heat or electricity does not
flow very well
Short Circuits
Station H
Insulators and Conductors
Look at each item in the list below. Identify each item as a conductor of
electric current or as a non-conductor (insulator) of electric current.
Item
39. House Key
40. Rubber Band
41. Coin
42. Wooden
Toothpick
43. Metal Fork
44. Plastic Spoon
45. Aluminum Foil
Conductor
of Electric Current
Non-conductor
(Insulator)
of Electric Current
Short Circuits
Station I
For questions 46 – 49 below, select the one word that best completes the
sentence.
46. The filament of a light bulb produces light and _____________
A.
B.
C.
D.
sound
voltage
current
heat
47. Insulators ________________ the flow of electric current.
A.
B.
C.
D.
increase
decrease
reverse
do not change
48. The wires used to connect bulbs and batteries _______________
A.
B.
C.
D.
are good insulators
are good conductors
are bad conductors
are not conductors or insulators
49. The base of a light bulb is made of metal so that _____________
A.
B.
C.
D.
It can break a circuit.
It can be an insulator.
It can conduct electric current.
It can be an electric cell.
Short Circuits
Station J
Schematic Diagram
50-55. (Note this question is worth 5 points)
Draw a schematic diagram of a circuit that can be used to light two
bulbs, such that if one bulb goes out, the other bulb remains lit.
Short Circuits
Station L
Ohms Law
(Bonus and 1st Tie Breaker)
Complete the following table to demonstrate your understanding of
Ohm’s Law and the rules for two resistors connected in series to a 12
volt battery.
(Note – this is a challenging question and requires that you explored and
practiced Ohms Law and you have a very good understanding of how
current and voltages are related in a series circuit.
Ohms Law is a mathematical relation between these three variables ( V –
voltage, I – current, and R – resistance). The equation is V = I R.
Voltage
(volts)
Current
(amperes)
Resistance
(ohms)
R1
2
R2
4
Total
12