Electric and Magnetic Forces Review

Students rubbed a balloon across a square of carpet to give it an electrical charge. They found that the charged balloon could pick up pieces of paper.

What data could the students collect to tell them if the electric charge on the balloon is getting stronger?

• The length and width of the balloon

• The number of pieces of paper picked up

• The size of the piece of carpet

• The distance the balloon was rubbed

Tags

NGSS.3-PS2-3

If we want to test the strength of electrical forces between a pair of charged objects, which of the following questions should we ask?

• How much mass does each object have?

• Are the objects made up of the same material?

• Does each object sink or float in water?

• What happens when the objects are moved further apart?

Tags

NGSS.3-PS2-3

Two magnets pull on each other. What would make the magnets pull with less force?

• Use two stronger magnets.

• Add heat to one magnet.

• Turn both magnets around.

• Move the magnets further apart.

Tags

NGSS.3-PS2-3

Which of the following tells how the parts can be placed to hold the cabinet door closed?

• Iron plates at Locations 1 and 3 and magnets at Locations 2 and 4

• A single magnet at Location 3 and a single iron plate at Location 1

• Iron plates at location 2 and 4 and magnets at Locations 1 and 3

• A single magnet at Location 1 and a single iron plate at Location 2

Tags

NGSS.3-PS2-3

NGSS.3-PS2-4

NGSS.3-5-ETS1-1

Students attached magnets to toy cars. They want on car to push another car without touching it. How can the students arrange the two cars so they will push each other without touching it?

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Tags

NGSS.3-PS2-3

NGSS.3-PS2-4

True of False:

If I tried to use a magnet to pick up a rubber ball the magnet would attract the rubber ball and would be able to pick it up.

• True

• False

Tags

NGSS.3-PS2-3

True or False:

There are special magnets in my refrigerator door that help keep my refrigerator door closed.

• True

• False

Tags

NGSS.3-PS2-3