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WorksheetsEnergy Transfer, Magnetism and Electricity
Total questions: 25
Worksheet time: 45mins
Name
Class
Date
1.
What is the original energy source for the electrical circuit in the diagram?
a)
insulated wires
b)
music
c)
solar cells
d)
sun
2.
What energy is transformed directly into light, sound, and heat produced by the television?
a)
chemical
b)
electrical
c)
mechanical
d)
solar
3.
Which energy transformation occurred?
a)
chemical energy transformed into light and heat energy.
b)
Electrical energy transformed into light and heat energy.
c)
Heat energy transformed into light and electrical energy.
d)
Light energy transformed into heat and chemical energy.
4.
Michelle has a robot that is powered by batteries. When the switch is on, the robot moves. The energy transformations that take place in the robot are shown in the flow chart. What form of energy is X?
a)
heat energy
b)
light energy
c)
sound energy
d)
electrical energy
5.
Which section represents mechanical energy being converted to electrical energy?
a)
Part A
b)
Part B
c)
Part C
d)
Part D
6.
What two type of energy are produced by the dryer in the diagram?
a)
heat and chemical
b)
mechanical and heat
c)
electrical and chemical
d)
mechanical and electrical
7.
Which energy transformations(s) is (are) recorded correctly?
a)
electric iron
b)
electric motor
c)
electric bell and electric iron
d)
electric bell and electric motor
8.
Two lamps, one with a thick filament and one with a thin filament, are connected in parallel to a battery. What explains why the lamp with the thicker filament burns more brightly?
a)
Thin filaments offer less resistance and are better at conducting electrons through a circuit.
b)
The lamp with the thin filament is closer to the battery, which causes the voltage to be higher.
c)
Thick filaments offer less resistance and allow more current to flow through the circuit.
d)
The higher voltage is due to faculty wiring, as teh lamps would normally have the same brightness.
9.
Solar cells can be used to light a street lamp. Which option describes the energy transformation in this process?
a)
solar > chemical > electrical>light
b)
solar > electrical > chemical > light
c)
solar > chemical >
10.
Students were instructed to design an electrical circuit that transforms chemical energy to electrical energy to sound energy. Which equipment must be included in their circuit?
a)
battery, light bulb, switch
b)
solar panel door bell, battery
c)
portable heater, wire, battery
d)
battery, wire, buzzer
11.
What is the correct sequence of energy transformation that occurs when the switch is moved to the on position?
a)
chemical >light > heat
b)
chemical > heat > electrical
c)
chemical > electrical > light
d)
chemical > light > electrical
12.
An iron core is wrapped with a metal wire an connected to a battery. When it is placed between the poles of a magnet and an electric current passes through the wire, the coil rotates. Which device was built?
a)
a generator
b)
an electromagnet
c)
a normal magnet
d)
an electric motor
13.
What is the purpose of the transformer drum?
a)
The voltage from the house is decreased
b)
The voltage from the long distance power lines is increased
c)
The voltage from the house is increased for transmission.
d)
The voltage from the long distance power lines is decreased.
14.
The diagram shows a coil of copper wire wrapped around an iron cylinder and connected to a battery. How will students be able to use this device in a science experiment?
a)
They can use the electricity it generates to power a light bulb.
b)
They can use the temporary magnetic field it creates to pick up metal paper clips.
c)
They can use the device as a switch in an electrical circuit.
d)
They can use its chemical energy to create electricity that sins the coiled wire.
15.
Which upgrade would have the greatest positive impact on South Carolina's power grid?
a)
a smart grid that can react quicly to electricity demands
b)
more power plants that can supply as much electricity to the grid as possible
c)
more transmission lines to increase the amount of out-of-state electricity
16.
Water stored behind a dam eventually flows downward and powers generators that produce electricity. What type of energy is stored in the water behind the dam?
a)
chemical energy
b)
kinetic energy
c)
potential energy
d)
mechanical energy
17.
What source of energy causes electrical energy to flow in the circuit?
a)
chemical energy
b)
kinetic energy
c)
potential energy
d)
solar energy
18.
Which statement best explains the Law of Conversation of Energy as illustrated in this example?
a)
The electrical energy in the battery is equal to the chemcial enetgy produce by the battery to power the light bulb.
b)
The electrical energy produced by the battery is greater than the light and heat energy produced by the light bulb.
c)
The energy given off as light and hat by the light bulb is less than the original chemical energy supplied by the battery.
d)
The energy given off as light and heat by the light bulb is equal to the original chemical energy supplied by the battery.
19.
A metal spoon is used to stir hot chocolate in a ceramic mug. Which statement describes the direction of heat transfer that occurs?
a)
from the spoon to the mug
b)
from the mug to the spoon
c)
from the spoon to the hot chocolate
d)
from the hot chocolate to the spoon
20.
Which best explains how Earth's atmosphere is warmed
a)
Radiation from the sun warms the surface and through conduction and convection the atmosphere is heated
b)
Radiation from the sun warms the surface and through evaporation and convection the atmosphere is heated
c)
Convection from the sun warms the surface and through evaproation and convection the atmosphere is heated
d)
Convection from the sun warms the surface and through conduction and radiation the atmosphere is heated
21.
Which activity best demonstrates the transfer of heat energy through radiation?
a)
An egg is frying in a heated pan.
b)
A marshmallow is burning when held above a campfire.
c)
A hamburger is cooking on a hot grill.
d)
A metal in a cup of hot tea.
22.
Which process best explains why a mug feels warm after it is filled with hot chocolate?
a)
conduction
b)
convection
c)
magtetism
d)
radiation
23.
a)
It converts the electrical current to a higher-voltage current.
b)
It supplies the original energy source for the system.
c)
It transmits the higher-voltage current throughout the power grid.
d)
It produces the electrical current using mechanical energy of the turbine.
24.
What powers the generator to create electricity?
a)
dam
b)
electric power lines
c)
river
d)
reservoir's water pressure
25.
What is represented by x?
a)
electric motor
b)
electromagnet
c)
generator
d)
magnet
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