Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Science 9 > Unit 4 - Topic 1 > Flashcards

Unit 4 - Topic 1 Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

Static electricity

A

A charge produced by rubbing or touching objects together

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Unbalanced charges

A

A more correct term for static electricity cuz charges are non stationary; rather they move

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Laws of Charges

A

Laws describing behaviour between charged and uncharged objects

  1. Unlike charges attract
  2. Like charges repel
  3. Charged objects attract uncharged (neutral) objects
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Insulators

A

Any material in which charge stays on spot where object is rubbed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Conductors

A

Materials that allow charges to move freely

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Superconductors

A

Materials that offer little or no resistance to the flow of charges

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Electric discharges

A 
Small sparks 
Serious safety hazards 
Can:
Shock ppl
Damage electronic equipment 
Cause fires and explosions
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Neutralized

A

Became balanced

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Grounding

A

Connecting an object to Earth with conduction wire to safely rebalance a charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Most non-metals are …

A

Insulators

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Most metals are …

A

Conductors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Electric charges produced

A

Materials rubbed, touched, moved closer together then separated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Electroscope

A

Instrument detecting electric charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Dosimeters

A

Pocket-sized electroscopes
Used to measure exposure to atomic radiation
Charged particles produced by radiation detected by it
Strict limits to radiation exposure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Difficult to … electric charge …

A

Measure

Directly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Quantity of electric charge expressed in

A

Coulombs (C)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Van de Graaff generator

A

Produces large electric charges on metal sphere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Neutral (“uncharged”)

A

Equal + and - charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

+ vs. - charge

A

Excess + charge vs. -

20
Q

Benjamin Franklin

A

1706-1790

1st using terms + and - to describe charges

21
Q

Charge left on amber jabbed w/ fur/Franklin

A

Negative

22
Q

Charge left on fur/Franklin

A

Positive

23
Q

2 dif. charges, 1 + and -

A

Unlike charges

24
Q

2 same charges (both + or -)

A

Like charges

25
Q

Franklin understood

A

All matter consists of atoms
Which contain protons and electrons
Helped establish Laws of Charges

26
Q

Hold electrons loosely

A

Conductors

27
Q

Hold electrons tightly

A

Insulators

28
Q

Allow electrons to move but not at all freely

A

Fair conductors

29
Q

Semiconductors conductivity increased

A

By implanting foreign atoms into otherwise pure material

30
Q

Silicon w/ gallium added

Germanium w/ phosphorus added

A

Commonly used superconductors

31
Q

-137.15 C to -273.15 C

A

Temps certain materials become superconductors at

32
Q

Superconductors con

A

Need low temps

33
Q

Superconductors used for

A

Electrical generators
High-voltage power lines
Supercomputers

34
Q

Superconductors pros

A

Take up less space
Can carry higher charges than ordinary ones
7000% space efficient

35
Q

Fair conductors

A

Allow electrons to move, but not at all freely

36
Q

Modern theory

A

Unbalanced charges on solid materials dure to movement of electrons form one object to another

37
Q

Why unbalanced better than static

A

Instances when charges move so static kinda of inaccurate

38
Q

Metal alloys and ceramics

A

Superconductors

39
Q

Increased by adding foreign atoms into otherwise our material

A

Conductivity

40
Q

Gasoline trucks/highway

A

Blowing wind/dust over bumpy roads

Becomes charged

41
Q

Trucks always … before delivering gasoline

A

Grounded

42
Q

Grounding of trucks prevents

A

Sparking

Could cause fumes to explode

43
Q

Movement of gasoline through hose produces

A

Charges

44
Q

Grounding cable remains attached when

A

Before and during delivery

45
Q

Hand-held ionizers

A

Neutralize electrostatic charges on non-conductors

Science 9 (21 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions