Bellwork Quiz 3 Flashcards

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1
Q

Students learned objects can exert forces on each other without touching. 3 investigations support what they learned.

A. Measuring how close a soda can be before it rolls toward a static balloon.

B. Counting the # of staples attached to the magnet (using magnetic force).

C. Dropping a rubber ball from a distance of 1.5 meters above the floor.

D. Placing a magnet against a jar containing a mixture of iron fillings and sand.

E. Measuring how far a car travels across the floor before stopping.

A

A, C, D

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2
Q

Mass was added to the block on a pulley system connected to a wooden model car. What happens?

A. The car’s speed slowly increased.

B. The car moved right away.

C. The car doesn’t move.

A

B

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3
Q

Atoms contain…

A

Protons, Neutrons, and Electrons

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4
Q

The law of electric charges tells us what?

A

Like charges repel and opposite charges attract.

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5
Q

2 things that affect the size of the electric forces.

A

Amount of charge & Distance between charges

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6
Q

What is an electric field?

A

Area around a charged object where electric forces can be exerted on another object.

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7
Q

Based on the diagram, how will the charges move?

(Proton) (Proton)

A

Away from eachother

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8
Q

How do electric fields interact?

A

When charged particles are close enough to exert a force on each other, their electric fields interact. Like charges repel and opposite charges attract.

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9
Q

3 ways to charge an object

A

Friction, Conduction, Induction

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10
Q

What are conductors?

A

A type of material that electricity can move through easily.

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11
Q

What are insulators?

A

A type of material that electricity cannot move through easily. (Stops electricity from going anywhere else)

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12
Q

Example of a conductor and insulator.

A

C: Copper/Metals
I: Plastic

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