Download ( /13) (Use the response sheet to circle your answers.)

Grade 9 Science
Unit 3
Chapter 8
Name: _______________
Part A: Fill-Ins ( /12) (Use the response sheet provided to fill in your
answers.)
1. The electrical energy stored in a battery is called __.
2. The amount of electric potential energy per coulomb of charge is called __.
3. ___ is another name for potential difference.
4. ___ convert chemical energy into electrical energy stored in charges.
5. ___ are combinations of electrochemical cells connected together.
6. The terminals of a battery are called ___.
7. A complete pathway that allows electrons to flow is called an ___.
8. Any device that transforms electrical energy into other forms of energy is
called an ___.
9. ___ is the amount of charge passing a given point in a conductor per
second.
10. ___ is the continuous flow of charge in an electric circuit.
11. ___ slows down the flow of electrons and transforms electrical energy.
12. ___ are used to control current or potential difference in a circuit.
Wordlist:
~ current electricity 10
~ electric current 9
~electric circuit 7
~electrical resistance 11
~electrochemical cells 4
~ Batteries 5
~potential difference 2
~ electric potential energy 1
~electric load 8
1
~resistors
12
~voltage 3
~electrodes 6
Part B: True or False ( /13) (Use the response sheet to circle
your answers.)
1. Voltage is measured using a voltmeter. T
2. Extra electrons build up on one terminal of a battery making it positively
charged.
F
3. In an Ipod the electrons ‘stored electrical energy’ is transformed into
sound energy.
T
4. A ‘C Battery’ with 1.5 volts has a greater potential difference that a ‘AA’
1.5 volt battery.
F they have the same voltage
5. It is possible for a 1.5 volt battery to have more potential energy than
another type of 1.5 volt battery.
T
6. The amount of voltage produced in any electrochemical cell depends upon
the types of metal and electrolyte used in the cell. T
7. It is possible to make electrical energy using friction. T
8. A battery is an example of an electric load in a circuit. F
9. A light bulb is an example of an electric load in a circuit. T
10. Electric current is measured in amperes. T
11. The measurement for electrical resistance is volts.
F
12. If a battery is connected to a circuit that has a large resistance more
current will flow through the circuit.
F
13. A long, thin wire will provide more electrical resistance than a short,
wide wire.
F
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Part C: Constructed Responses ( /20) Use the space provided to
complete each response.
Question 1. Compare, using an example of a staircase, potential energy of a
battery and potential difference.
_____________________________________________________
_____________________________________________________
_____________________________________________________
_____________________________________________________
_____________________________________________________
_____________________________________________________
_____________________________________________________
Question 2. Place a number in the space provided to correctly order the
events that occur when a battery is placed in an electric circuit. (Note, the
first # is provided.)
1st ~ chemical energy in the battery gives the electrons on the negative
terminal electric potential energy.
___ ~ after passing through the load there is no more electric potential
energy.
5
___ ~ there is a pathway provided by a conducting wire which allows
electrons to leave the negative terminal and push their way towards a load. 3
___ ~ electrons are attracted to the positive terminal of the battery. 2
___ ~ electrons travel back to the battery to complete the circuit.
6
___ ~ in the load the electric potential energy is transformed into other types
of energy such as sound or light. 4
3
Question 3. Use circuit symbols to draw the circuit in the picture below.
Place diagram and symbols from page 262 263
Question 4. Use the formula 𝑹 =
𝑽
𝑰
to complete the following.(Show All
workings.)
a. The current through a load in a circuit is 2.0 A. If the potential
difference across the load is 1.5 V, what is the resistance of the load?
0.75 ohs
b. A 12 V potential difference is measured across a load that has a
resistance of 3.0 Ω. What is the current through this load?
4 A
4
Chapter 8 Fill-In and Multiple Choice Response Sheet
Part A: Fill-Ins
Part B: True or False
1. _____________________
1. T or F
2. _____________________
2. T or F
3. _____________________
3. T or F
4. _____________________
4. T or F
5. _____________________
5.
6. _____________________
6. T or F
7. _____________________
7. T or F
8. _____________________
8. T or F
9. _____________________
9. T or F
10. ____________________
10. T or F
11. ____________________
11. T or F
12. ____________________
12. T or F
T or F
13. T or F
5
1. Answer: Potential energy in a battery is due to both the
potential difference or voltage (height of the stairs) and the
amount of charge that has been separated measured in coulombs
(mass moved up the stairs.
6