Spiral Review Electric and Magnetic Forces

Lily and Jackson are playing with two magnets. As they move the magnets further apart, the attraction between them will:

• Decrease

• Stay the same

• Increase

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NGSS.MS-PS2-3

As Anika moves further away from a charged balloon, the strength of the electric field she experiences (a)   .

• Increases
• Decreases
• Stays the same

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Ava is playing with a bar magnet and notices that some areas attract paper clips more strongly than others. Where on the magnet is the magnetic force the strongest?

• At the poles

• In the middle

• Above the magnet

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Evelyn is working on a science project to create a strong electromagnet. How can she make the electromagnet stronger?

• Add more wire coils and/or batteries

• Add a motor and/or lightbulbs

• Add more light bulbs and/or wire coils

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NGSS.MS-PS2-3

During a science class, James was learning about different types of fields. He discovered that electric fields are often associated with what other kind of field?

• Magnetic Fields

• Nuclear Fields

• Particle Fields

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James and Elijah are playing with magnets. They notice that there is a repelling force between ________ poles and an attracting force between __________ poles.

• Opposite, like

• Like, like

• Opposite, opposite

• Like, opposite

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NGSS.MS-PS2-3

Emma and Isla notice that the force of magnetism is stronger when the magnets are (a)  

• Cold
• Round
• Closer together
• Farther apart

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Arjun and Anika are discussing how scientists have created trains that use magnets to make the trains float above the tracks as they travel. These trains float because:

• The track is waxed

• The like poles repel

• The train has low density

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During a science class, Emma asked her teacher what creates the Earth's magnetic field?

• The spinning of the mantle around the crust

• The spinning of the outer core around the inner core

• The spinning of the inner core around the outer core

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Abigail notices that when she adds more coils to an electromagnet, it can pick up more paper clips. What is the likely effect of adding more coils?

• Increase the magnetic field

• Decrease the magnetic field

• No change in the magnetic field

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