Circuits, Electricity and Magnetism

Pick the correct sentence.

• This circuit will work because it is a closed circuit.

• Energy will freely flow in this circuit.

• This circuit will not work because there is no energy source.

• This circuit will not work because there is no switch.

What THREE ways are electromagnets different from permanent magnets?

• they can be turned off and on

• they can increase in strength by increasing the current in the wire

• they are smaller in size

• they can change which is the north and south pole

Choose all of the items that will conduct electricity.

• Glass marble

• Rubber balloon

• Copper penny

• Paper clip

• Wooden block

Look at picture -- Why will the lightbulb in circuit B NOT light up?

• the light bulb is out of energy

• the battery is out of energy

• One wire is not connected and the circuit is open

• one wire is not connected and the circuit is closed

Look at picture #4-- When you connect a series circuit using two bulbs and one D-cell, the bulbs are dim. When you connect a parallel circuit with two bulbs and one D-cell, the bulbs are bright. What are two bulbs in a parallel circuit brighter?

• The D-cell provides less electric energy in the circuit

• Components in the circuit share one pathway

• Components in the circuit share two or more pathways

• The D-cell proves more electric energy in the circuit

A fourth grade student has the following components:

• A D-cell battery
• Two short wires
• A mini lightbulb

The student was asked to create a working circuit that would light up the lightbulb, but the wires were too short. Which of the following components would assist in completing the circuit?

• An insulator like a wooden cube

• A conductor, like a drinking straw

• A conductor, like a piece of aluminum foil

• An insulator, like a penny

Tags

NGSS.3-5-ETS1-1

NGSS.3-5-ETS1-2

NGSS.4-PS3-2

NGSS.4-PS3-4

Look at -- Students made an electromagnet by wrapping a wire in loops around an iron nail and attaching the wire to a battery. The students conducted a test to learn how the number of wire loops affected the number of paper clips held by the electromagnets. The table show the results of the test. Based on the information in the table, which of the following is the best conclusion?

• adding more wire loops makes an electromagnet weaker

• adding more wire loops make an electromagnet stronger

• adding more wire loops make an electromagnet use less electricity

• adding more wire loops makes an electromagnet use more electricity

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

The students conducted a test to learn how the number of wire loops affected the number of paper clips held by the electromagnet. Look at picture #10. The table shows the results of the test.

• Adding more wire loops makes an electromagnet weaker

• adding more wire loops makes an electromagnet stronger

• Adding more wire loops make an electromagnet use less electricity

• adding more wire loops makes an electromagnet use more electricity

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Look at picture #3-- Which of the following best explains the purpose of using a metal paper clip

• the paper clip is a conductor and doesn't allow the flow of electricity

• the paper clip is a conductor and allows the flow of electricity

• the paper clip is an insulator and does not allow the flow of electricity

• the paper clip is an insulator and allows the flow of electricity

A circuit is the path followed by an electric current. A circuit is made up of three parts. The first part is energy source, such as a battery or generator. The second part is an energy receiver, such as a motor or lightbulb. The third part is a connection, such as a wire or cable that carried energy from the source to the receiver. In addition, there are two basic types of circuits: series and parallel. According to the passage, what is the second part of a circuit?

• electric current

• energy source

• engird receiver

• a generator