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Difference between revisions of "Unit"

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==Key Stage 3==
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==Key Stage 4==
 
===Meaning===
 
===Meaning===
 
[[Unit]]s are quantities that give a number meaning.
 
[[Unit]]s are quantities that give a number meaning.
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|'''Other Units'''
 
|'''Other Units'''
 
|-
 
|-
−
|Distance, Length, Width, Height
+
|Distance, Displacement, Wavelength
 
|metres
 
|metres
−
|millimetres, centimetres, feet, kilometres, miles
+
|nanometres, micrometers, millimetres, centimetres, feet, kilometres, miles
 
|-
 
|-
 
|Time
 
|Time
 
|seconds
 
|seconds
−
|minutes, hours, days, weeks, months, years
+
|microseconds, milliseconds, minutes, hours, days, weeks, months, years
 
|-
 
|-
 
|Temperature
 
|Temperature
−
|degrees Celcius
+
|degrees Celcius or Kelvin
 
|degrees Faranheit
 
|degrees Faranheit
 
|-
 
|-
 
|Mass
 
|Mass
 
|kilograms
 
|kilograms
−
|grams
+
|micrograms, milligrams, grams, megagrams (ton)
 
|-
 
|-
 
|Area
 
|Area
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|Volume
 
|Volume
 
|metres cubed
 
|metres cubed
−
|millilitres, centimetres cubed, litres, millimetres cubed
+
|millilitres, centimetres cubed, litres, decimetres cubed
 
|-
 
|-
 
|Force, Weight
 
|Force, Weight
 
|Newtons
 
|Newtons
−
|Pounds, Ounces, Stone
+
|Pounds, Ounces, Stone, millinewtons, kilonewtons
 
|-
 
|-
−
|Speed
+
|Speed and Velocity
 
|metres per second
 
|metres per second
 
|miles per hour, kilometers per hour
 
|miles per hour, kilometers per hour
 +
|-
 +
|Density
 +
|kilograms per metre cubed
 +
|grams per centimetre cubed
 +
|-
 +
|Angle
 +
|degrees
 +
|
 +
|-
 +
|Acceleration
 +
|metres per second per second
 +
|feet per second per second
 +
|-
 +
|Moment
 +
|Newton Metres
 +
|
 +
|-
 +
|Energy, Work Done
 +
|Joules
 +
|millijoules, kilojoules
 +
|-
 +
|Electrical Charge
 +
|Coulombs
 +
|microcoulombs, millicoulombs
 +
|-
 +
|Electrical Current
 +
|Amps
 +
|microamps, milliamps, kiloamps
 +
|-
 +
|Potential Difference
 +
|Volts
 +
|microvolts, millivolts, kilovolts
 +
|-
 +
|Resistance
 +
|Ohms
 +
|microohms, milliohms, kiloohms
 +
|-
 +
|Radioactivity
 +
|Becquerels
 +
|
 +
|-
 +
|Radiation Dose
 +
|Ohms
 +
|microsieverts, millisieverts
 +
|-
 +
|Frequency
 +
|Hertz
 +
|kilohertz, megahertz, gigahertz
 +
|-
 +
|Magnetic Field Density
 +
|Teslas
 +
|milliteslas
 +
|-
 +
|Moles
 +
|Mol
 +
|
 +
|-
 +
|Concentration
 +
|Mol per decimeter cubed
 +
|
 +
|-
 +
|Light intensity
 +
|Lux
 +
|
 
|}
 
|}

Revision as of 14:01, 21 March 2019

Key Stage 2

Meaning

A unit is an amount that we can use to give a number meaning.

About Units

Without units a number doesn't mean anything. For example if you ask someone how far away is London and they say '150', that doesn't mean anything. 150 what? 150 camels away? 150 seconds away? 150 metres away? A unit gives the number meaning. Perhaps London is 150 kilometres away.
The units you should know are shown in the following table:
Measurement Standard Unit Other Units
Distance, Length, Width, Height metres millimetres, centimetres, feet, kilometres, miles
Time seconds minutes, hours, days, weeks, months, years
Temperature degrees Celcius degrees Faranheit
Mass kilograms grams
Area metres squared centimetres squared
Volume metres cubed millilitres, centimetres cubed, litres, millimetres cubed
Force, Weight Newtons Pounds, Ounces, Stone
Speed metres per second miles per hour, kilometers per hour

Key Stage 3

Meaning

Units are quantities that give a number meaning.

About Units

Units used in science mean the same thing everywhere. A metre is the same distance everywhere.
Without units a number doesn't mean anything. For example if you ask someone how far away is London and they say '150', that doesn't mean anything. 150 what? 150 camels away? 150 seconds away? 150 metres away? A unit gives the number meaning. Perhaps London is 150 kilometres away.
The units you should know are shown in the following table:
Measurement Standard Unit Other Units
Distance, Length, Width, Height metres millimetres, centimetres, feet, kilometres, miles
Time seconds minutes, hours, days, weeks, months, years
Temperature degrees Celcius degrees Faranheit
Mass kilograms grams
Area metres squared centimetres squared
Volume metres cubed millilitres, centimetres cubed, litres, millimetres cubed
Force, Weight Newtons Pounds, Ounces, Stone
Speed metres per second miles per hour, kilometers per hour

Key Stage 4

Meaning

Units are quantities that give a number meaning.

About Units

Units used in science mean the same thing everywhere. A metre is the same distance everywhere.
Without units a number doesn't mean anything. For example if you ask someone how far away is London and they say '150', that doesn't mean anything. 150 what? 150 camels away? 150 seconds away? 150 metres away? A unit gives the number meaning. Perhaps London is 150 kilometres away.
The units you should know are shown in the following table:
Measurement Standard Unit Other Units
Distance, Displacement, Wavelength metres nanometres, micrometers, millimetres, centimetres, feet, kilometres, miles
Time seconds microseconds, milliseconds, minutes, hours, days, weeks, months, years
Temperature degrees Celcius or Kelvin degrees Faranheit
Mass kilograms micrograms, milligrams, grams, megagrams (ton)
Area metres squared centimetres squared
Volume metres cubed millilitres, centimetres cubed, litres, decimetres cubed
Force, Weight Newtons Pounds, Ounces, Stone, millinewtons, kilonewtons
Speed and Velocity metres per second miles per hour, kilometers per hour
Density kilograms per metre cubed grams per centimetre cubed
Angle degrees
Acceleration metres per second per second feet per second per second
Moment Newton Metres
Energy, Work Done Joules millijoules, kilojoules
Electrical Charge Coulombs microcoulombs, millicoulombs
Electrical Current Amps microamps, milliamps, kiloamps
Potential Difference Volts microvolts, millivolts, kilovolts
Resistance Ohms microohms, milliohms, kiloohms
Radioactivity Becquerels
Radiation Dose Ohms microsieverts, millisieverts
Frequency Hertz kilohertz, megahertz, gigahertz
Magnetic Field Density Teslas milliteslas
Moles Mol
Concentration Mol per decimeter cubed
Light intensity Lux
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