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Science 6 > Electricity : Chapter 1 - Section 1 > Flashcards

Electricity : Chapter 1 - Section 1 Flashcards

1
Q

True or False : All matter is made up of very small particles called atoms.

A

True.

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2
Q

True or False : Atoms are made up of even smaller particles called protons, neurons and electrons.

A

True.

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3
Q

True or False : Neurons are charged, protons and electrons are not.

A

False. Protons and electrons are charged, neurons are not.

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4
Q

True or False : Charge is a physical property.

A

True.

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5
Q

True or False : An object can only have a positive charge.

A

False. An object can have positive charge, negative charge or no charge.

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6
Q

True or False : Charged objects exert a force on other charged objects.

A

True.

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7
Q

What does the law of electric charge state?

A

The law of electric charge states that charges repel (push away) and opposite charges attract.

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8
Q

What type of charge do protons have?

A

Positive charge.

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9
Q

What type of charge do neurons have?

A

No charge.

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10
Q

What type of charge do electrons have?

A

Negative charge.

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11
Q

True or False : Since protons and neurons have opposite charges, they are attracted to each other.

A

True.

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12
Q

True or False : Without electrons and protons being attracted to each other, electrons could not be held in atoms.

A

True.

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13
Q

What is electric force?

A

The force between charged objects.

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14
Q

What two things does the size of the electric force depend on?

A
  1. The amount of charge on each object. 2. The distance between the charges.
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15
Q

True or False : The smaller the charge, the greater the electric force is.

A

False. The greater the charge, the greater the electric force is.

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16
Q

True or False : The greater the distance between the charges, the greater the electric force.

A

False. The closer the charges are, the greater the electric force is.

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17
Q

Why are charged things affected by electric force?

A

Charged things are affected by electric force because charged things have an electric field around them.

18
Q

What is the electric field?

A

The region around a charged object in which the electric force is exerted on another charged object.

19
Q

True or False : A charged object is attracted or repelled by the electric field acting on it.

A

True.

20
Q

True or False : Atoms have an equal number of protons and electrons.

A

True.

21
Q

True or False : Since protons and electrons cancel each other out, atoms are positively charged.

A

False. Since protons and electrons cancel each other out, atoms don’t have a charge.

22
Q

True or False : An object becomes positively charged when it loses it’s electrons

A

True.

23
Q

True or False : An object becomes negatively charged when it gains electrons.

A

True.

24
Q

True or False : An object can become charged by friction, conduction or induction.

A

True.

25
Q

How does charge by friction occur?

A

When electrons are “wiped” from one object to another.

26
Q

How does charge by conduction occur?

A

When electrons move from one object to another by direct contact.

27
Q

How does charge by induction occur?

A

When charges in an uncharged metal object are rearranged without direct contact with a charged object.

28
Q

True or False : When you charge something by any method, no charges are created or destroyed

A

True.

29
Q

True or False : Since charges are not created or destroyed, charge is said to be wasted.

A

False. Since charges are not created or destroyed, charge is said to be conserved.

30
Q

What device can you use to determine if an object is charged?

A

You can use a device called an electroscope to see if something is charged.

31
Q

True or False : You can use an electroscope to determine if an object’s charge is negative or positive.

A

False. You cannot determine if an object’s charge is positive or negative by using an electroscope, you can only tell if it is charged or not.

32
Q

What is an electroscope, and how does an electroscope work?

A

An electroscope is a glass flask that has a metal rod in it’s rubber stopper; two metal leaves attached to the bottom of the rod. When electroscope is not charged, leaves hang straight down, when electroscope is charged, leaves repel each other (spread apart).

33
Q

True or False : Different materials are used because electric charges move through some materials more easily than they move through others.

A

True.

34
Q

What is an electrical conductor?

A

An electrical conductor is material in which charges can move easily.

35
Q

Why are most metals good conductors?

A

Because some of their electrons are free to move.

36
Q

What is an insulator?

A

An electrical insulator is a material in which charges cannot move easily.

37
Q

Why don’t insulators conduct charges well?

A

Because their electrons cannot flow freely.

38
Q

What is static electricity?

A

Static electricity is the electric charge at rest on an object

39
Q

True or False : Charges of static electricity do not move away from the object that they are in (so object keeps it’s charge).

A

True.

40
Q

What is electric discharge?

A

The loss of electricity as charges move off of an object.

41
Q

True or False : Sometimes electric discharge happens quickly (flash of light, a shock, crackling noise).

A

True.

42
Q

Does this diagram represent an atom?

A

Yes.

Science 6 (5 decks)

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