What does the metric prefix 'kilo' mean?
AnswerOne thousand
A kilometer is 1,000 meters and a kilogram is 1,000 grams.
Science · Facts & stats
10x facts & stats
7 fact-checked facts about powers of ten, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What does the metric prefix 'milli' mean?
AnswerOne thousandth
A millimeter is one thousandth of a meter.
Going deeper
What power of ten does the prefix 'mega' represent?
Answer10⁶
Mega means one million, so a megawatt is 1,000,000 watts.
What power of ten does the prefix 'giga' represent?
Answer10⁹
Giga means one billion, 10 to the power of 9.
What is 10 to the power of 0?
Answer1
Any nonzero number raised to the power of 0 equals 1.
Expert level
What power of ten does the prefix 'nano' represent?
Answer10⁻⁹
Nano means one billionth; a nanometer is 10⁻⁹ meters.
On the pH scale, a drop of one unit means hydrogen ion concentration changes by what factor?
Answer10 times
pH is logarithmic, so pH 3 has ten times the hydrogen ion concentration of pH 4.
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