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Science Electrons Topic > Seneca > Flashcards

Seneca Flashcards

1
Q

What can Particles Have?

A

A positive charge
A Negative charge
And no charge

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2
Q

Finish the sentence

Overall an atom is _______. It has no charge

A

Neutral

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3
Q

If an atom becomes charged, what is it called?

A

ion

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4
Q

Protons have what charge?

A

Positive

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5
Q

Neutrons have what charge?

A

No charge

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6
Q

Electrons have what charge?

A

Negative

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7
Q

What happens if an atom loses an electron?

A

It will become positively charged

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8
Q

What happens if an atom gains an electron?

A

It will become Negatively charged

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9
Q

What do Atoms contain?

A

Electrons, Protons and neutrons

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10
Q

Charges that are the same . . .
Attract
Do nothing
Repel

A

Repel

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11
Q

Protons have a ________ charge. Neutrons have no charge.They are _______. Electrons have a ________ charge.

A

Positive
Neutral
Negative

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12
Q

How is Static Electricity caused?

A

Static electricity is caused by negatively charged electrons jumping from one material to another.

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13
Q

What happens when you rub two insulating materials together?

A

When you rub two insulating materials together, one substance will lose electrons the other will gain electrons.

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14
Q

Is Static Electricity Contact or Non-contact force?

A

Static electricity is a non-contact force.

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15
Q

Why is Static Electricity Non-contact?

A

It is non-contact because the charged objects do not have to touch to attract or repel.

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16
Q

Static electricity is a non-contact force. It is non-contact because the charged objects do not have to _____ to attract or repel.

A

Touch

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17
Q

What Magnets repel?

A

Like-poles

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18
Q

What are the two sides of a magnet called?

A

South pole and North POle

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19
Q

Are Magnetic Forces Contact or Non-Contact

A

Non-contact

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20
Q

Are all Metal Magnetic?

A

NO

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21
Q

Which Metals are Magnetic?

A

Nickel – Ni
Iron – Fe
Cobalt – Co

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22
Q

Why is steel not counted as a magnetic metal?

A

Because steel is called a alloy. It is because it contains iron

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23
Q

Magnets have two _____ which are found at either end of the magnet. The poles are named the _____ Pole and the North Pole. Opposite poles _______. Like poles repel.

A

poles
South
attract

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24
Q

How must field lines be drawn?

A

With an arrow pointing from north to south

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25
What happens if the Magnetic field is stronger?
If the magnetic fields are strongest at either the north or south poles, the field lines will be closer together.
26
How do Magnets exert forces?
Magnets exert forces within their magnetic fields.
27
Field lines must be drawn with an arrow pointing from _____ to south. The magnetic fields are _________ at either the north or south poles. The field lines will be closer together.
North Strongest
28
Hayley is jumping a ruler with a cloth. As she does this, the cloth rubs off electrons. Explain the effects on the objects and how they change.
1)Ruler loses electrons and so becomes positive 2)Cloth gains electrons and so becomes negative
29
What does a series circuit contain?
2 bulbs a battery (made of two cells) Switch
30
What is a parralell Circuit contain?
2 bulbs a battery (made of two cells) Switch
31
What is the current of a series circuit?
The current in the series circuit is steady and calm which mean sit stays the same
32
What is the current of a parallel circuit?
The current in a parallel circuit quick near the battery but when the electrons head towards the branches, they share between how many branches there are
33
What happens to the Ammeter when you add more cells?
It increases by 0.5
34
What is Electric Current?
The flow of electrons
35
Where should the voltmeter be placed?
Must be placed parallel from the component
36
In a series circuit how is the voltage split?
The voltage is shared evenly
37
In a parallel circuit how is the voltage split?
The voltage stays the same
38
What is Potential difference?
The difference of Voltage around the circuit/the amount of energy given to a circuit by cells and batteries.
39
What is an Electric Conducter?
Allows electricity to pass through
40
What is Electric insulator?
Steps electricity to pass through
41
What does a resistance do?
It opposes the flow of current
42
What does a large resistance
It makes it more difficult for a current to flow
43
What is the meausured unit of resistance?
Ohms
44
What is the meausured unit of Voltage?
Volts
45
What is the meausured unit of Currents?
Amps
46
What does Ohms stand for?
Omeger
47
What would you do if you have to find out the Resistance?
Voltage Divide Current
48
What would you do if you have to find out the Voltage?
Resistance x Current
49
What would you do if you have to find out the Current?
voltage divide Resistance
50
What is Magnetic Force?
It attracts magnetic material to a magnet
51
What is Repulsion?
Force that pushes two objects appart
52
What is non-magnetic?
It means not attracted to a magnet
53
What is North-seeking Pole?
The end of a freely suspended magnet that forces north
54
What does Magnetic mean?
attracted to a magnet
55
What does poles mean?
The two ends of a magnet.
56
Why are electromagnets more powerful than a normal magnet?
Because an Electromagnet can turn on and off
57
What happens if you increase a current?
then the battery becomes stronger
58
What can you do to make the circuit stronger?
Increase the number of coils Increase the current Add an Ion core
59
What is an Independent Variable?
What you change For example, How many coils
60
What is an dependent variable?
The number of paper clips you can pick up
61
What is an Control Variable?
What stays the same For example, Thevoltage,Same Ion rod,The wires
62
What will increase the strength of the magnetic field around a circuit? 1.Increasing the current] 2.Moving futher from the curent 3.Switching the current off
1. Increasing the current
63
Where are the field lines most concentrated around a bar magnet?
At both poles
64
How can you reverse a magnetic field in a circuit?
connect the battery the other way round or wind the coil in the other direction
65
What is one difference between electromagnets and bar magnets?
electromagnets need electricity but bar magnets do not

Science Electrons Topic (2 decks)

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