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7 science > alex 7 science unit 2 test > Flashcards

alex 7 science unit 2 test Flashcards

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Biology 101 flashcards
1
Q

energy

A

The ability to do work or cause change. Energy
has many forms, all of which measure the ability of an object to do work on or change another object.In other words, there are different ways that an object can possess energy.

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2
Q

mechanical energy

A

kinetic

potential

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3
Q

different forms

A 
Thermal, or heat energy
Chemical Energy
Electrical Energy
Electrochemical Energy
Electromagnetic Energy (light)
Sound Energy
Nuclear Energy
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4
Q

potential energy

A

Potential energy is energy due to position or stored energy. Potential energy is also called gravitational potential energy.

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5
Q

Kinetic energy

A

Kinetic energy is the energy of motion. Kinetic energy is measured by how much is work done to put an object in motion or to rest.

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6
Q

Conservation of Energy law

A

Energy cannot be created or destroyed; it can only be changed from one of form of energy to another form. The amount of energy stays the same.

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7
Q

Temperature

A

How hot or cold it is. Measured in degrees Celsius.

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8
Q

Heat

A

The amount of thermal energy, measured in joules or J. exampleA cup of hot tea has heat energy in the form of kinetic energy from its particles.

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9
Q

Matter

A

Anything that moves

Anything that takes up space

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10
Q

3 types of matter

A

Solid
liquid
gas

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11
Q

how does matter change

A 
freezing
 melting 
boiling
 Condensing
Evaporation
sublimation
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12
Q

evaporation

A

particles in a liquid escape to form a vapour.Evaporation can occur at any temperature but it occurs most rapidly at a liquid’s boiling point.The particles that escape take some energy from the remaining particles and so the temperature of the liquid falls.

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13
Q

The Law of Conservation of Energy

A

Energy is always conserved, it is never “lost” or “wasted“.Some energy transfers are useful and some are not.

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14
Q

The particle model

A

All substances are made up of particles (atoms, ions or molecules).These particles are attracted to each other, some strongly and others weakly.These particles move around (i.e. have kinetic energy).The kinetic energy of particles increases with temperature.

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15
Q

Solid to liquid

A

melting

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16
Q

Liquid to gas

A

evaporation

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17
Q

Gas to solid

A

sublimation

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18
Q

Solid to gas

A

sublimation

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19
Q

Gas to liquid

A

condensation

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20
Q

Liquid to solid

A

freezing

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21
Q

Types of thermometers

A

Thermo couple
Bimetallic strip
recording thermometer
Inferred thermo gram

22
Q

malleable

A

bendable

23
Q

ductility

A

strech

24
Q

Parts of a thermometer

A

Sensor
Signal
responder

25
Q

Boiling point water kelvin

A

373.15

26
Q

Boiling point water Celsius

A

100

27
Q

Boiling point water Fahrenheit

A

212

28
Q

Melting point water kelvin

A

273.15

29
Q

Melting point water Celsius

A

0

30
Q

Melting point water Fahrenheit

A

32

31
Q

Absolute zero kelvin

A

0

32
Q

Absolute zero Celsius

A

-273.15

33
Q

Absolute zero Fahrenheit

A

-459.67`

34
Q

Melting is also called

A

fusion

35
Q

Fusion is also called

A

melting

36
Q

Freezing is also called

A

solidification

37
Q

Solidification is also called

A

freezing

38
Q

radiation

A

gas

39
Q

conduction

A

solid

40
Q

convection

A

liquid

41
Q

rsi value

A

resistance

42
Q

Sources of energy

A 
Chemical
Geothermal
Electrical
Fossil fuels
wind
Mechanical
Solar
nuclear
43
Q

Passive solar heating

A

uses materials in structure to heat home

44
Q

Active solar heating

A

Uses mechanical devices to heat home

45
Q

Non-renewable resources

A

Millions of years to form

46
Q

Renewable resources

A

Can be recycled

47
Q

Greenhouse effect

A

Global warming

48
Q

cogeneration

A

waste heat being used to heat buildings

49
Q

Thermal pollution

A

Technology and industries release a lot of thermal energy into environment

50
Q

Liquid

A

Gas

liquid

51
Q

insulators

A

Poor conductors

7 science (6 decks)

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