Transcript 644 Resources - simonbaruchcurriculum

Chapter Resources
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glencoe.com
Image Bank
Foldables
Video Clips and Animations
Chapter Summary
Chapter Review Questions
Standardized Test Practice
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Transfer Images
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• Open the “Resource” file from the CD-ROM disc –
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Electricity
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Van der
Graaf
Generator
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Ions Move
in Solutions
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Electric Forces
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Electric Field
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Insulators and
Conductors
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Electrical Wires
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Lightning
Rod
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A Model for a Simple Circuit
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Various
Batteries
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Alkaline
Battery
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Resistance
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Electrical
Wiring
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Resistance of Wires
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Light Bulb
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Controlling the Current
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Fuses
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Table –
Power Used
by Common
Appliances
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Outside Electric Meter
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Table – Preventing Electric Shock
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Table –
Electric
Shock
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Lightning Bolt Striking the Ground
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Foldables
Electricity
Make the following Foldable to help you
understand the terms electric charge, electric
current, and electric circuit.
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Foldables
Fold the top of a vertical piece of paper down
and the bottom up to divide the paper into
thirds.
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Foldables
Turn the paper
horizontally;
unfold and
label the three
columns as
shown.
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Foldables
Read and Write
Before you read the chapter, write a definition
of electric charge, electric current, and electric
circuit in the appropriate column. As you read
the chapter, correct your definition and add
additional information about each term.
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Video Clips
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Video Clips
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Reviewing Main Ideas
1
Electric Charge
• The two types of electric charge are
positive and negative. Like charges repel
and unlike charges attract.
• An object becomes negatively charged if it
gains electrons and positively charged if it
loses electrons.
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Reviewing Main Ideas
1
Electric Charge
• Electrically charged objects have an electric
field surrounding them and exert electric
forces on one another.
• Electrons can move easily in conductors, but
not so easily in insulators.
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Reviewing Main Ideas
2
Electric Current
• Electric current is the flow of charges—
usually either electrons or ions.
• The energy carried by the current in a circuit
increases as the voltage in the circuit
increases.
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Reviewing Main Ideas
2
Electric Current
• In a battery, chemical reactions provide the
energy that causes electrons to flow in a
circuit.
• As electrons flow in a circuit, some of their
electrical energy is lost due to resistance in
the circuit.
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Reviewing Main Ideas
3
Electric Circuits
• In an electric circuit, the voltage, current,
and resistance are related by Ohm’s law.
• The two basic kinds of electric circuits are
parallel circuits and series circuits.
• The rate at which electric devices use
electrical energy is the electric power used by
the device.
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Chapter Review
Question 1
Three lightbulbs are wired in an electric
circuit. When one lightbulb is removed from
the circuit, the other two lightbulbs continue to
glow. This circuit is an example of what type
of circuit?
A. damaged string of lights
B. parallel circuit
C. insulator
D. series circuit
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PS 4.4e
Chapter Review
Answer
The circuit is an example of a parallel circuit. The
lightbulb that was removed was wired in parallel
with the other two lightbulbs. Removing that
bulb did not break the flow of current into the
other two lightbulbs because there was more than
one path for current to follow.
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Chapter Review
Question 2
What is the purpose of a fuse or circuit breaker
in a household electric circuit?
Answer
A fuse or a circuit breaker limits the amount of
current that can flow in a circuit. This keeps the
wires in the household circuit from becoming
hot enough to cause a fire.
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PS 5.2b
Chapter Review
Question 3
The rate at which electrical energy is
converted into other forms of energy is
known as _______.
Answer
The answer is electric power. This quantity
can be calculated using P = IV.
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PS 4.4d
Chapter Review
Question 4
The amount of electrical energy equal
to using 1 kW of power continuously
for 1 hr is called what?
Answer
The answer is one kilowatt-hour. This
is written as 1 kWh.
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PS 4.4d
Chapter Review
Question 5
A(n) _____ occurs when static charge moves
quickly from one object to another.
A. series circuit
B. electric discharge
C. induced charge
D. electric resistance
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PS 4.4
Chapter Review
Answer
The answer is B. A spark is an example of an
electric discharge.
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Standardized Test Practice
Question 1
The separation of positive and negative charges
due to an electric field is called a(n) _______.
A. transfer of charge
B. induced charge
C. electric discharge
D. electric current
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PS 4.4f
Standardized Test Practice
Answer
ANSWER: B. The doorknob in the figure has an
induced charge because
the electric field
around excess negative
charges on the hand
repel negative charges
on the doorknob.
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Standardized Test Practice
Question 2
Substances in which electrons do NOT move
easily, such as rubber and glass, are known as
_________.
A. conductors
B. metals
C. insulators
D. lightning rods
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PS 4.4
Standardized Test Practice
Answer
The answer is C. The opposite of an insulator
is a conductor.
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Standardized Test Practice
Question 3
What is being
illustrated in this
figure?
A. electric current
B. parallel circuit
C. series circuit
D. voltage
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PS 4.4e
Standardized Test Practice
Answer
The answer is C. In a series circuit there is
only one path for electric current to follow.
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Standardized Test Practice
Question 4
An electric _____ surrounds an electric charge
and exerts a force on other electric charges.
A. current
B. discharge
C. resistance
D. field
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PS 5.2b
Standardized Test Practice
Answer
The answer is D. The electric field around a
charge exerts a force on other charges even if
the charges are not touching.
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Standardized Test Practice
Question 5
The _______ of a battery is a measure
of how much electrical potential
energy each electron can gain.
A. amperes
B. resistance
C. voltage
D wattage
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PS 4.4
Standardized Test Practice
Answer
The answer is C. Voltage is measured
in Volts (V).
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