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Year 7 Science > Energy, Substances And Working Scientifically > Flashcards

Energy, Substances And Working Scientifically Flashcards

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1
Q

Independent variable?

A

A variable that you change.

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2
Q

Dependent variable?

A

The one you measure

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3
Q

Control variable?

A

Variable kept the same

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4
Q

Random error?

A

Things you have no control over

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5
Q

Systematic error?

A

Problems with the equipment of method you used

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6
Q

Accurate?

A

Close to the true value

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7
Q

Anomalies?

A

Results that do not fit the pattern

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8
Q

Energy?

A

The ability for something to do work

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9
Q

Seven energy types?

A

Nuclear, elastic, electromagnetic,kinetic, gravitational,chemical, thermal

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10
Q

Renewable?

A

An energy source that can be replaced and will not run out

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11
Q

Fossil fuel station?

A

Fuel is burnt to make steam which spins a turbine which turns a generator to produce electricity

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12
Q

Particle?

A

A very tiny object like a atom or a molecule

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13
Q

Liquid?

A

Particles move freely past each other cabinet be compressed

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14
Q

Solid?

A

Particles are close togethor
Cannot be compressed

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15
Q

Gas?

A

Fast moving and spread out
Can be compressed

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16
Q

Particles always…

A

Move

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17
Q

Atom

A

The smallest particle of an element

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18
Q

Element

A

A substance made up of only one tiny atom

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19
Q

Molecule

A

Two or more atoms chemically bonded togethor

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20
Q

Compound

A

Substance made from two or more elements chemically bonded togethor

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21
Q

Mixture

A

Two or more substances mixed togethor but do not react togethor

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22
Q

Solute

A

A solid that can dissolve in a solvent

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23
Q

Solvent

A

A substance that dissolves another substance

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24
Q

Chromatography

A

Method for separating soluble substances from one another

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25
Q

Crystallisation

A

Used to separate a soluble solid from a liquid

26
Q

Moving particles

A

Particles move faster as the temperature goes up

27
Q

Conserved

A

Energy can not be created or destroyed only transferred

28
Q

Work done?

A

Energy transferred 

29
Q

Mechanical work

A

Forces and waves

30
Q

Electrical work =

A

Electric currents

31
Q

Electromagnetic radiation equals

A

Light

32
Q

Heating equals

A

Conduction and convection

33
Q

What is power measured in?

A

Watts

34
Q

Power equals

A

Energy transferred / time

35
Q

P =

A

E/t

36
Q

Name two nuclear fuels

A

Uranium and plutonium
(Both of which are radioactive metals)

37
Q

Fossil fuels

A

Formed from the remains of an ancient plants or animals. Examples of coal, crude oil and natural gas.

38
Q

Biofuels

A

Any fuel taking from living or recently living organisms?

39
Q

Wind

A

A turbine uses the force of wind

40
Q

Wave

A

Waze are used to make a floating generator, move up and down

41
Q

Hydroelectric

A

Uses the power of floating water to turn turbines

42
Q

Tidal

A

Traps water from each high tide behind a barrage, the high tide can then be released into see-through turbines

43
Q

Solar

A

Solar cells and solar panels are the sons energy to generate electricity or heat water

44
Q

Geothermal

A

You just some energy from hot rocks beneath the earths surface to turn turbines

45
Q

Particle model

A

Away to think about how substances behave, in terms a small, moving particles

46
Q

Gas pressure

A

Caused by collisions of particles of the walls of the container

47
Q

Density

A

How much matter that is in a particular volume or how close the particles are?

48
Q

Evaporate

A

Change from liquid to gas at the temperature surface of a liquid at any temperature

49
Q

Boil

A

Change from a liquid to a gas all the liquid when the temperature reaches boiling point

50
Q

Condense

A

Change of state from gas to liquid when the temperature dropped to the boiling point

51
Q

Melt

A

Change from solid to liquid when the temperature rises to the melting point

52
Q

Freeze

A

Change from a liquid to a solid when the temperature drops to the melting point

53
Q

Sublime

A

Change from a solid directly into a gas

54
Q

Melting point

A

Temperature when a solid becomes a liquid

55
Q

Boiling point

A

Temperature when a liquid becomes a gas

56
Q

Solution

A

Mixture formed when a solvent dissolves a solute

57
Q

Solubility

A

A measure of how much is substance, dissolves in a certain volume of solvent

58
Q

Filtration

A

Separating substances using a filter to separate an insoluble solid from a liquid

59
Q

Density (g/cm3) =

A

mass (g) / volume (cm3)

60
Q

What will An object less dense than water do?

A

Float

61
Q

Mrs gren

A

Movement reproduction sensitivity growth respiration excretion nutrition

Year 7 Science (8 decks)

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