Electricity and Magnetism

How is the device above different from an electric motor?

• Electric motors turn mechanical energy into electrical energy.

• Electric motors turn electrical energy into mechanical energy.

• Electric motors turn chemical energy into mechanical energy.

• Electric motors turn mechanical energy into chemical energy.

Tags

NGSS.MS-PS3-5

Turbines are huge wheels in power plants that rotate when pushed by water, wind, or steam. How do turbines affect generators?

• They rotate the magnets.

• They directly turn on the light bulb.

• They produce gasoline.

• None of the above

When using iron filings to create a magnetic field in his lab activity, Cameron needs to remember to follow which lab safety procedure?

• Use caution when working with heat or open flame.

• Tell the teacher about accidents or spills right away.

• Keep hands away from eyes when using iron filings.

• Follow all proper handling of animals and plants in the classroom.

Look at picture #5--- Adam built an electromagnet, and recorded the step by step directions in his science notebook. Part of his page was ripped and step 3 is missing. Based on this entry, which of the following would be step 3?

• Connect the opposite end of the wire, to the side of the D-cell

• Connect the opposite end of the wire, to the head of the nail

• Connect the opposite end of the wire to the negative side of the D-cell

• Connect the opposite end the wire to the positive side of the D-cell

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

If two magnets stick together, they do what?

• repel

• attract

• change

• retract

Tags

NGSS.MS-PS2-5

Look at picture 1: Which two magnets are attracting each other?

• 1 and 2

• 2 and 3

• 3 and 4

• 4 and 5

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What will cause a decrease in the forces of attraction between two magnets?

• Increase the size of the two magnets

• Change the color of the two magnets

• Change the texture of the two magnets

• Increase the distance between the two magnets

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

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

Tags

NGSS.MS-ETS1-2

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