Which best describes an open circuit?
a. a complete path that allows the flow of energy to transfer from the source to the receiver.
b. an incomplete path that does not allow the flow of energy of electricity to transfer from the source to the receiver
c. a complete path that does not allow the flow of electricity to transfer from the source to the receiver
d. an incomplete path that allows the flow of electricity to transfer from the source to the receiver
What is an incomplete path that does not allow the flow of energy of electricity to transfer from the source to the receiver
100
Magnets attract in which way?
a. north to north, south to south
b. just south to south
c. just north to north
d. north to south and south to north
What is north to south and south to north
100
In a flashlight electrical energy is transferred to what type of energy?
a. sound energy
b. mechanical energy
c. light energy
d. chemical energy
What is light energy
100
Objects that can conduct electricity easily can carry a charge. Which of the following materials best conducts electricity?
a. rubber sheets
b. copper wire
c. plastic tubing
d. cotton string
What is copper wire
100
Which material would make a good insulator?
a. iron
b. copper
c. magnet
d. wood
What is wood
200
Which best describes an closed circuit?
a. a complete path that allows the flow of energy to transfer from the source to the receiver.
b. an incomplete path that does not allow the flow of energy of electricity to transfer from the source to the receiver
c. a complete path that does not allow the flow of electricity to transfer from the source to the receiver
d. an incomplete path that allows the flow of electricity to transfer from the source to the receiver
What is a complete path that allows the flow of energy to transfer from the source to the receiver
200
When iron fillings are sprinkled around a magnet, they demonstrate the __________of the magnetic field.
a. weight
b. shape
c. color
d. height
What is shape
200
When electricity runs through a stereo, what type of energy is being produced?
a. sound
b. mechanical
c. kinetic
d. light
What is sound energy
200
Electricity can be used to produce powerful forces. What type of energy is electricity converted to in an electromagnet?
a. heat energy
b. sound energy
c. magnetic energy
d. light energy
What is magnetic energy
200
In a box there is a mixture of iron fillings and sand. Which is the easiest way to separate the iron fillings from the sand?
a. heat the mixture
b. use a magnifying glass
c. magnet
d. pour water on the mixture
What is magnet
300
Magintism created by a current flowing through a conductor is...
a. electricity
b. repulsion
c. conduction
d. electromagnetism
What is electromagnetism
300
The area around a magnet that behaves like a magnet is called a magnetic_____.
a. color
b. sound
c. field
d. all of the above
What is field
300
Which of the following is an example of electrical energy transforming into mechanical energy?
a. using a light bulb to light a room
b. boiling water on an electric stove
c. using magnets to create an electric current
d. carrying people in an electric elevator
What is carrying people in an electric elevator
300
Which one of these things uses an electromagnet?
a. a watch
b. an electric motor
c. a refrigerator magnet
d. a light bulb
What is an electric motor
300
Students investigate balls as they roll down ramps and discover the higher the ramp, the more energy the ball is given. Which observation would be evidence for the idea that rolling balls that contain more energy travel faster?
a. balls that roll down ramps 30 cm high go fast at first, but then they slow down and stop
b. balls that roll down ramps 10 cm high go faster on a tile floor than on a carpeted floor
c. balls that roll down ramps 20 cm high never travel any farther that 250 cm
d. balls that roll down ramps 20 cm high go faster than balls that roll down ramps 10 cm high
What is balls that roll down ramps 20 cm high go faster than balls that roll down ramps 10 cm high
400
One way to increase the strength of an electromagnet would be to _____
a. use paper insulation
b. increase the power source
c. you cannot increase the flow
d. non of the above
What is increase the power source
400
Davion wants to build and electromagnet. What three materials will Davion need?
a. compass, battery, and wires
b. battery, wires, and a solenoid wrapped around an iron core
c. solenoid wrapped around an iron core, wires, light bulb
d. battery, wires, light bulb
What is battery, wires, and a solenoid wrapped around an iron core
400
Which of the following is an example of electrical energy transforming into heat energy?
a. turning on a cell phone
b. striking a match
c. baking bread in an electric oven
d. lifting a heavy box
What is baking bread in an electric oven
400
A conductor allows electricity to flow ______
a. not easily
b. easily
c. not at all
d. all of the above
What is easily
400
Which magnet will have the weakest attraction?
a. one magnet, 3 cm from the object
b. one magnet, 3 ft from the object
c. 2 magnets 3 cm from the object
d. 2 magnets 3 ft from the object
What is one magnet, 3 ft from the object
500
What are the parts of a circuit?
a. battery, wires, light bulb, glass
b. battery, wires, switch, wood
c. wires, light bulb, switch, metal
d. wires, power source, light bulb, switch
What is wires, power source, light bulb, switch
500
A magnetic field has _____lines.
a. straight
b. curved
c. iron
d. copper
What is curved
500
What type of energy transfer happens when you turn on a light bulb?
a. potential energy is transformed into light energy
b. electrical energy is transformed into light energy
c. mechanical energy is transformed into heat energy
d. electrical energy is transformed into mechanical energy
What is electrical energy is transformed into light energy
500
Which of the following are good conductors of electricity
a. aluminum wood and plastic
b. wood, steel, and iron
c. copper, iron, steel
d. rubber, wood, steel
What is copper, iron, steel
500
Which of the following statements is true?
a. the stronger the magnet, the magnetic objects can be attracted to it.
b. the weaker the magnet the more magnetic objects can be attracted to it.
c. the stronger the magnet the less magnetic objects can be attracted to the magnet
d. none of the above
What is the stronger the magnet, the magnetic objects can be attracted to it.