WorksheetsScience-Power Up to STAAR Science p.7 and 8
Total questions: 10
Worksheet time: 5mins
An electromagnet is a device that uses an electric current to magnetize an object. Students build an electromagnet with a metal rod, a battery, and an insulated wire, to see how many paperclips it can pick up. The students repeated the investigation three times. Why do the students repeat the investigation three times?
to test different variables
to make a different hypothesis
to test the validity of the results
to make the experiment more fun
What changes need to be made to the electric circuit to make the motor spin?
nothing needs to be changed.
wire one needs to connect tot he motor
another battery needs to be other
straighten the wire so that electricity will flow more easily
Two bells and a battery are used to build a circuit. What conclusion can be drawn from the diagram of the circuit?
The circuit is complete and the bells will ring.
The bells will not right because the circuit is incomplete.
The bells will ring louder because there are two.
The bells will ring because they are connected to a large battery.
Open and closed circuits are used all around us. Which answer choice best explains what happens when you turn on a light switch?
The switch closes the circuit allowing electricity to flow through and turn on the light.
The switch opens the circuit allowing electricity to flow through and turn on the light.
The switch provides the energy needed to turn on the light.
The switch makes the light burn brighter.
All of the following are ways to conserve electrical energy EXCEPT--
Turn off the lights when you leave the room.
Line dry your clothes outside.
Open the shades instead of turning lights on.
Keep the television on while you sleep.
Shown below are four circuits. Which circuit is a working circuit?
Switches are used in circuits to control the flow of electrical energy. Above is a picture of a knife switch that is open. The knife switch can be connected to a battery and a buzzer to produce a sound. Which statement best explains why the knife switch has a metal bar?
Closing the knife switch will complete the circuit because metal is a good conductor of electricity.
Closing the knife switch will complete the circuit because metal is a good insulator of electricity.
The metal bar will make the buzzer louder.
The metal bar creates sound.
Students create three different circuits in an investigation. Which circuits will light the bulbs?
Circuit 3 only
Circuit 2 only
Circuits 2 and 3
Circuits 1 and 3
The picture is a main power switch. When the lever is in the ON position, electricity can travel to areas it is connected to. This happens because--
The ON position creates an open circuit.
The ON position creates a closed circuit.
The lever provides energy for the circuit.
The lever is a conductor for the circuit.
Which of the following can electricity produce?
sound
light
heat
all of them
