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science test- electricity > h > Flashcards

h Flashcards

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1
Q

lightning

A

negative charge moving towards a positive charge

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2
Q

steps of lightning

A

proton said+ electrons rearrange in the cloud dude to too many electrons.
the electrons move towards a positive charge through induction

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3
Q

conductors + insulators

A

materials that allow electrons to move (metal and copper)

materials that don’t allow electrons to move easily

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4
Q

semiconductors

A

can either transfer or not transfer electrons like silicon

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5
Q

grounding

A

connecting acharged ibject to earths surface. providing a path for charges to travel to or from the ground

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6
Q

laws of attraction

A

opposites attract

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7
Q

neutral atoms

A

positive and negative net charge are balanced no net charge

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8
Q

cation

A

postitive net charge

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9
Q

anion

A

negative net charge

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10
Q

electron affinity

A

tendency of a substance to hold on to electrons.

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11
Q

voltage

A

measured in volts

electrical pressure

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12
Q

current

A

measured in amps

flow of electricity

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13
Q

resistance

A

measured in ohms

opposition to the flow of a current

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14
Q

low resistance m

A

short wire
low resistance
thick wire

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15
Q

high resistance

A

long wire
high temperature
thin wire

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16
Q

how voltage, current and resistance affect eachother

A

ohms law

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17
Q

ohms law

A

V= IR

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18
Q

dry cell

A

the zinc container contains a moist chemical paste sureoundin a carbon rod suspended in middle

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19
Q

wet cell

A

contains two connected plates made of different metals in a conduction fluid

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20
Q

circuits

A

contains: connecting wire, lamp/load, battery, switch, resistor, ammeter, voltmeter

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21
Q

energy consumption

A

unit = KWH
how much power the device uses x how long it’s on = consumption
1000watts = 1 kilowatt

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22
Q

percent efficiency

A

efficiency= Ein/Eout x 100
energy out: device gives
energy in: device takes

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23
Q

power costs

A

consumption x cost/kwh = total cost

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24
Q

fossil fuels

A
  • electrical energy produced from organic matter of pragmatism’s that lived millions of years ago
    ex: coal, oil, natural gas
  • non renewable
25
Q

fossil fuels use

A

coffin fuels are burned to boil water, they are kept under pressure for the steam to reach a high temperature. the high pressure steam strikes and pushes the blades on a turbine

26
Q

wind

A
  • energy produced by moving air

- renewable

27
Q

wind use

A

wind turbines using wind to turn their blades, which are connected to generators.
faster air= more energy produced

28
Q

renewable energy source

A

energy source that will remain available and not run out

29
Q

non renewable energy source

A

energe source that has a limited amount of use

30
Q

static electric charge

A

charge that remains on the surface

31
Q

resistor

A

slows down current flows

32
Q

switch

A

means if interrupting or complete ling the circuit

33
Q

ammeter

A

measures current

34
Q

battery

A

composed of a chemical substance that can generate and can be used in a circuit

35
Q

current electricity

A

flowing very rapidly through a conductor. has voltage

36
Q

ampere

A

measure of how much electrical current is flowing

37
Q

voltmeter

A

measures voltage in a circuit

38
Q

volts

A

unit of voltage

39
Q

voltage

A

electrical pressure

40
Q

multimeter

A

device that slows you to read measurements of current, voltage

41
Q

electrical discharge

A

object releases electrons

42
Q

electrical charges

A

electrons and protons

43
Q

electric current

A

rate of flow of electrical charge

44
Q

electrode

A

conductors through which electricity enters or leaves the body

45
Q

electrolytes

A

a liquid or gel that contains ions

46
Q

fuse

A

device to shut of a electrical circuit when too much electrical current is flowing

47
Q

series circuit

A

components connected through one single path, sharing a voltage source

48
Q

parallel circuit

A

components connected along multiple paths so that the current can split up

49
Q

biomass

A

burning wares to drive heat engines. renewable.

waste decomposes to methane gas, which is burned to boil water, make steam and power turbines

50
Q

energy grid

A 
power plants
transmission lines
substations
power lines
transformers
electrical wiring and circuit box
51
Q

generators

A

magnets+motion+copper wire=electricity

-

52
Q

geothermal

A

energy produced by water heated from milton rock. water from earths core rises and produces steam

53
Q

hydroelectric

A

fast flowing water used to power turbine

54
Q

neuclear

A

produced by the chain reactions of atoms in heavy elements. atoms are spilt which releases an enormous amount of energy. this is used to produce steam

55
Q

kilowatt hour

A

unit of electric energy

56
Q

sustainable development

A

economic development done with destruction of natural resources

57
Q

transformer

A

static electrical device that transfers electrical energy between two or more circuits

58
Q

turbine

A

a machine used to produce continuous power

science test- electricity (1 decks)

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