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Grade 9 Science > Unit 6: Static Electricity > Flashcards

Unit 6: Static Electricity Flashcards

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1
Q

What is electricity?

A

The flow of electrical energy caused by The movement of tiny particles called electrons.

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2
Q

What are the smaller particles that an atom contains

A

Protons, neutrons and electrons

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3
Q

What type of charge does a proton have

A

A proton has a positive charge (+)

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4
Q

What type of charge does an electron have

A

An electron has a negative charge (-)

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5
Q

What type of charge does a neutron have

A

You can either say:

A) A Neutron has no charge (0)

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6
Q

If an atom has the equal number of protons and electrons, does the atom have a charge?

A

No

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7
Q

If the number of protons and electrons are NOT equal, does the atom have a charge?

A

Yes

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8
Q

What is a charge atom called

A

An ion

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9
Q

What are the different types of ions

A

An Anion and a cation

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10
Q

What is an anion?

A

Anions are negatively charged ions
(more electrons than protons)

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11
Q

What is a cation

A

Cations are positively charged ions
(Less electrons than protons)

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12
Q

When atoms have an unequal number of protons and electrons, we say that they carry an ______.

A

Electric charge

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13
Q

What is an electric charge

A

An electric charge is a form of charge, either positive or negative, that exerts an electric force

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14
Q

What are all objects made of

A

Atoms

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15
Q

How is the overall charge of an object Determined

A

The overall charge of an object is determined by comparing the number of protons and electrons it contains

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16
Q

What is a neutral object

A

A neutral object is an object that has not been charged

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17
Q

How does a neutral object become charged?

A

Objects become charged when electrons are transferred between the objects, Causing the objects to either gain or lose electrons

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18
Q

Do neutral objects have a equal number of protons and electrons?

A

Yes

19
Q

Are there more protons in a negatively charged atom or are there more electrons?

A

A negatively charged object has more electrons than protons

20
Q

Are there more protons in a positively charged object or are there more electrons?

A

A positively charged object has more protons than electrons

21
Q

Does a negatively charged object gain or lose electrons?

A

A negatively charged object gains electrons

22
Q

Does a positively charge object gain or lose electrons?

A

A positively charged object loses electrons

23
Q

Does a positively charge object gain or lose electrons?

A

A positively charged object loses electrons

24
Q

What happens when 2 neutral objects come in contact with each other

A

When 2 neutal objects made of different materials come in contact with each other, electrons may transfer between the 2, causing the objects to become positively and negatively charged

25
Q

Which object becomes charged when electrons move from one object to the other

A

As electrons move from one object to the other, both objects will become charged
(One becomes positive and the other will become negative)

26
Q

What is static electricity

A

Static electricity is an imbalance of electric charge on the surface of an object

27
Q

What is The Law of Electric Charges

A

A charged object exerts an electric force

28
Q

Electric Force

A

The force exerted by an object with an electric charge; can be a force of attraction or repulsion

29
Q

Will objects with like charges repel or attract?

A

Repel

30
Q

Will objects with unlike charges repel or attract?

A

Attract

31
Q

What does the strength of the force depend on?

A

The amount of charge carried by each object and the distance

32
Q

Methods of charging (3)

A

• Friction
• Reduction
• Induction

33
Q

How are electric charges detected?

A

With electroscope(s)

34
Q

What are the 2 types of electroscopes?

A
  • Pithball electroscope
  • Metal leaf electroscope
35
Q

How do you determine if a charge is negative or positive?

A

More electrons = negative

More protons = positive

36
Q

What is an electrostatic series

A

An electrostatic series is a scale to measure the charge tendency (positive or negative based on the material)

37
Q

What is friction

A

When 2 objects rub against each other To transfer electrons

38
Q

What is conduction

A

When one charged object and 1 neutral object Touch each other to both become charged (- and +)

39
Q

What are the 2 types of induction

A

Temporary and permanent

40
Q

What is temporary induction

A

When a neutral and charged object go near each other and both become charged until the originally charged object is away

41
Q

What is a permanent induction

A

One charged object and 1 neutral object (grounded) go near and both become charged permanently

42
Q

What does it mean to ground an object

A

Grounding is connecting an object to a large body that is capable of removing the charge that an object might have

43
Q

Where do the electronics usually go when you ground an object

A

Grounding involves transferring electrons between a charged object and a very large neutral object such as The Earth

44
Q

What happens if the Earth gains or loses electrons

A

Because the Earth is such a big surface, It will still act as it is neutral

Grade 9 Science (8 decks)

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