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P.3 Science > Phisics End Unit Test > Flashcards

Phisics End Unit Test Flashcards

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0
Q

How do atoms lose or gain electrons?

A

Due to friction.

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1
Q

What part of an atom can jump from 1 to another

A

Electrons

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2
Q

What happens to two objects when they rub together

A

The force of friction can remove electrons from 1 object and cause them to transfer to another object

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3
Q

What attracts

A

+-
0+
0-

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4
Q

What repels

A

++

–

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5
Q

What NEVER repels

A

Neutral and neutral

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6
Q

What r the three ways to charge objects

A

Friction
Contact
Induction

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7
Q

How does something get charged by friction

A

Two objects are rubbed together

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8
Q

What does the electrostatic series or the triboelectric series tell you

A

Which object will gain and which will lose electrons

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9
Q

How do u charge something by contact

A

Neutral object can be charged when a + or - object touches it.

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10
Q

How does the triboelectric series work

A

Items at top of list loose electrons and items at bottom of list gain electrons

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11
Q

How do photocopiers use electrostatics

A

Ink is negatively charged

Paper charged positive where light was reflected

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12
Q

On a scale of 1-5 how quickly do electrical charges transfer

A

5, very quickly

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13
Q

Give 2 examples of electrical charges being transferred from one place to another

A

Lightning

Sparks

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14
Q

How does lightning happen

A

Negative charges build up in bottom of cloud
Ground is charged positive due to induction
Negative electrons exit cloud and go to the ground or highest place like a house or tree or lightning rod

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15
Q

How does the van de graaff generator work

A

Creates friction between roller and belt

Transfers electrons to large metal sphere

16
Q

Name 3 everyday electrostatics we would come in contact with

A

Dryer sheets
Spray painting
Photocopier

17
Q

How many paths r in a series circuit

A

1

18
Q

How many paths r in a parallel circuit

A

More than 1

19
Q

What does a battery look like

A

Bigger vertical line (+) on the left and smaller vertical line on the right (-)

20
Q

What does a lightbulb look like

A

Filament with a circle around it

21
Q

What does a resistor look like

A

Pointy line

22
Q

What does a switch look like

A

A dot at each end of the switch and a line on a 45 degree angle or flat

23
Q

What does fuse look like

A

Dot at each end and a sideways s in between

24
Q

What does an ammeter volt meter and motor look like

A

A, v, or m in a circle

25
Q

What is current electricity

A

The movement or flow of electric charges, electron, through conducting wires

26
Q

What is the path taken by the current called

A

Electric circuit

27
Q

What r the four main parts of an electric circuit

A

Source of energy
Electrical load
Control devices
Connectors

28
Q

Give an example of and explain a source of electrical energy

A

Dry cell, or battery

Causes the electrons to flow

29
Q

Give an example of and explain an electrical load

A

Light energy for light bulbs, heat energy for toasters

Uses electrical energy, converting that energy into the form it needs

30
Q

Give an example of and explain control devices

A

Switch, fuse, circuit breaker

Limit, control or completely stop the flow of electrons through the circuit

31
Q

Give an example of and explain connectors

A

Wires

Connect everything together

32
Q

What is current

A

The amount of charge or number of electrons

33
Q

What is voltage

A

Amount of energy

Push of each electron

34
Q

What is resistance

A

Something that slows down the flow of electrons

35
Q

How is current measured

What’s the letter it is represented by in the ohms law

A

Ampere (A)

I

36
Q

What is voltage measured in

What’s the letter it is represented by in the ohms law

A 
The volt (V)
V
37
Q

What is resistance measured in

What’s the letter it is represented by in the ohms law

A

The ohm

R

P.3 Science (4 decks)

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