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GCSE Chemistry · key term
The nearest power of ten used to describe the approximate scale of a quantity.
Used by AQA, Edexcel and OCR
Specification 4.10.1.1 · Paper 2
The power of ten that describes the approximate scale of a value.
Revise: Sustainability and Finite ResourcesAn order of magnitude is the approximate power of ten describing a value’s scale. A difference of one order of magnitude represents a factor of 10; two orders represent a factor of 100. Comparing exponents makes very large resource figures easier to interpret.
Specification 1.30 · Paper 1, Paper 2
An estimate of a quantity's scale expressed as the nearest power of ten.
The power of ten that best represents the approximate size of a quantity.
The approximate power of ten representing the scale of a quantity; quantities differing by one order of magnitude differ by a factor of about 10.
The nearest power of ten that represents the approximate scale of a quantity.
Specification C1.2c, CM2.2i, CM2.3ii, CM2.3iii, CM6.3ii · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
The approximate scale of a quantity, expressed as a power of ten.
A factor of ten used to describe the approximate scale of a measurement.
The approximate power of ten that describes the size of a quantity.
A tenfold difference in size between quantities; two orders of magnitude means a hundredfold difference.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
A tenfold change in the size of a quantity. A factor of 10 is one order of magnitude; 100 is two orders and 1,000 is three.
Revise: Orders of magnitudeAn order of magnitude is a convenient way to compare their sizes without becoming distracted by every digit.
A power of ten used to describe the approximate scale of a quantity, such as .
A power of ten used to show the approximate size of a quantity; for example, an atomic diameter is of the order of m.
The size of a quantity expressed as the nearest power of ten, used to compare scales approximately.
The power of ten that indicates the approximate scale of a number.
A compact way to express the approximate scale of a quantity using a power of ten.
When estimating, state the approximate value you used and give a sensible order of magnitude rather than unjustified precision.
If asked for an order of magnitude, give a power of ten with a unit. Do not imply that every atom or small molecule has exactly that size.
State whether a quoted value is a radius or a diameter. The diameter is twice the radius, although both have the same order of magnitude.
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