10 B Section review Flashcards

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1
Q

How can you tell that an electroscope has an electrical charge?

A

The two foil strips separate & stay like that until they are discharged.

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2
Q

Can you tell from an electroscope alone what kind of charge it has? Explain.

A

Yes. If the charge is positive or negative the leafs to separate since like charges repel.

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3
Q

Describe electrical conductors & insulators & give one example of each.

A

Electrical conductors offer little resistance to electron motion. Copper is a conductor. Electrical insulators do not allow electrons to move easily. Rubber is an insulator.

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4
Q

What do we call materials that conduct electricity only under special circumstances?

A

Semiconductors

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5
Q

How does a lightning rod work?

A

By giving lightning the fastest path to the ground.

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6
Q

The Bible teaches that God is in control of rain & lightning (Ps. 135:6-7). Is the use of a lightning rod an attempt to interfere with God’s judgment on the disobedient? Why or why not?

A

No. His mercy on humans is through the use of science.

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7
Q

What was the first device to successfully store electrical charges?

A

Leyden jar

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8
Q

Name two devices that use static electricity to complete a task.

A

Charged metal plates to reduce smokestack pollution, drum in a copier.

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9
Q

Give an example of static electricity (e.g. a biological one) not mentioned in the textbook.

A

When you pull a blanket up and get shocked.

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