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Science 7A > Unit Four > Flashcards

Unit Four Flashcards

1
Q

Definition: Thermal Energy

A

(Heat) total energy of all of the particles in a material or object

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2
Q

Definition: Thermometer

A

Mechanical or electrical devices for measuring temperature

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3
Q

Definition: Scale

A

A series of measured sections that are marked and numbered and used for measurement, basically a ruler.

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4
Q

Definition: Celcius Scale

A

Not very common measurement, measurement is degrees

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5
Q

What is the freezing point on the Celcius scale

A

0

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6
Q

What is the boiling point on the Celcius scale

A

100degrees

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7
Q

Definition: Kelvin Scale

A

Water freezes at 273

Water boils at 373

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8
Q

Definition: Sensor

A

A material which is affected by changes in some features of the environment, Such as temperature

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9
Q

Definition: Signal

A

Information about temperature

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10
Q

Definition: Responder

A

A pointer, light, or pther mechanism that uses the signal in some way

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11
Q

Definition: Thermocouple

A

Dependant on temperature, two twisted wires that expand and contract with heat

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12
Q

Definition: Bimetallic strips

A

Two metals joined together, curls and uncurls

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13
Q

Definition: Recording Thermometer

A

A bimetallic strip connected to a paper which records the fluctations

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14
Q

Definition: Infrared Thermogram

A

Records radiation,shows different colours for different heat signatures

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15
Q

Who is Galileo

A

He invented the early thermometers

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16
Q

Definition: Energy

A

The measure of somethings ability to do work

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17
Q

Change happens when there is a—–in—–.

A

Difference

Energy

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18
Q

Energy is always transferred from—-energy source to a—-energy source.

A

High

Low

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19
Q

Three steps of calibrating a thermomterer

A 
Step one
Liquid level is marked as 0for ice
Step two
Boiling level is 100
Step three 
Scale is divided into 100
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20
Q

To calibrate a thermometer accurately where should you be?

A

Sea level

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21
Q

Definition:Contract/Condense

A

To decrease in Volume

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22
Q

Definition: Expand

A

Increase in volume

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23
Q

Heat causes—–

Cool causes—–

A

Expansion

Contraction

24
Q

Definition: Heat capacity

A

The amount of thermal energy that warms or cools an object by one degree

25
Q

Definition: Specific heat capacity

A

The Amount of heat that heats one gram by one degree

26
Q

Definition:Change of state(8)

A 
Sublimation
Solids
Gases
Vaporization
Melting
Freezing
Condensation
Liquid
27
Q

Definition: Evaporative cooling

A 
Faster particles(liquid) evaporate
Slower ones left behind creating kinetic energy(cooling it)
28
Q

Definition:Phase changing

A

During change temp does not change

29
Q

Ways to transfer energy are…(3)

A

Radiation
Convection
Conduction

30
Q

Definition:Energy Source

A

An object or material that can transfer energy to other objects or materials

31
Q

Definition:Radiation

A

Transferring energy without any movement

32
Q

Definition: Radiant energy

A

Energy transferred by radiation

33
Q

Radiant energy does…(3)

A

Like waves
Can be absorbed and reflected
They travel through empty space at a speed of 300000km

34
Q

Definition: Thermal consuction

A

Transferring energy through collisions

35
Q

Definition: Heat insulators

A

Very poor conductors

36
Q

Definition: Convection

A

A warm fluid that carries thermal energy from place to place

37
Q

Definition: Potential energy

A

It has the potential to do something

38
Q

Definition: Kinetic energy

A

What is happening in the present

39
Q

Definition: Chemical energy

A

Kind in our body, also in batteries

40
Q

Definition:Energy Converters

A

Changes energy from one form to another

41
Q

Definition: Mechanical Forces

A

A source of thermal energy caused by friction

42
Q

Definition:Geothermal energy

A

Energy we harness from the earths interior

43
Q

Definition: Converters

A

Generate electrical energy

44
Q

Definition: Passive energy

A

Using materials and in the structure to absorb, store and release solar energy

45
Q

Definition: Active solar

A

Convert light energy absorbed by solar collectors into electrical

46
Q

Definition: Wind energy

A

Windmills

47
Q

Definition: Fossil Fuels

A

The mushy part of fossils made into chemicals(gas)

48
Q

Definition: Global Warming

A

The heat from fossil fuels being trapped in the earths atmosphere

49
Q

Definition: Thermal Pollution

A

Accidentally warming up the environment

50
Q

Definition: Cogeneration

A

Using waste heat to heat heeded areas

51
Q

Ways to conserve(save) energy(5)

A
  • Carpool
  • Install programable thermostat
  • Reduce energy use
  • Reduce showers
  • Insulate homes and water lines
  • Etc.
52
Q

What happened in the precambrian era?

A

Rodinia

53
Q

What happened in the Paleozoic era

A

First sign of life, pange

54
Q

What happened in the Cenozoic era?

A

People

55
Q

What happened in the mesozoic era?

A

Dinosaurs, plants, bacteria, birds, mammals

Science 7A (12 decks)

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