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: A millilitre is 1000 times smaller than an [[litre]].
: A microvolt is 1000,000 times smaller than a [[volt]].
==Key Stage 4==
===Meaning===
A '''unit prefix''' is a word used in front of a [[unit]] that changes its size.
===About Unit Prefixes===
There are several '''unit prefixes''' you should know:
*[[mega]] (M) - 1000,000 times bigger. (10<sup>6<sup>)
*[[kilo]] (k) - 1000 times bigger. (10<sup>3<sup>)
*[[deci]] (d) - 10 times smaller. (10<sup>-1<sup>)
*[[centi]] (c) - 100 times smaller. (10<sup>-2<sup>)
*[[milli]] (m) - 1000 times smaller. (10<sup>-3<sup>)
*[[micro]] (µ) - 1000,000 times smaller. (10<sup>-6<sup>)
*[[nano]] (n) - 1000,000,000 times smaller. (10<sup>-9<sup>)
===Examples===
: A megawatt is 1000,000 times bigger than a [[watt]].
: A decimetre is 10 times smaller than a [[metre]].
: A millilitre is 1000 times smaller than an [[litre]].
: A nanovolt is 1000,000,000 times smaller than a [[volt]].