#separator:tab #html:false #tags column:4 kilo- 1,000 times (k) sci-si-units-prefixes hecto- 100 times (h) sci-si-units-prefixes deka- 10 times (da) sci-si-units-prefixes deci- one tenth (d) sci-si-units-prefixes centi- one hundredth (c) sci-si-units-prefixes milli- one thousandth (m) sci-si-units-prefixes micro- one millionth (the Greek letter mu) sci-si-units-prefixes nano- one billionth (n) sci-si-units-prefixes pico- one trillionth (p) sci-si-units-prefixes femto- 10 to the negative 15 (f) sci-si-units-prefixes mega- 1,000,000 times (M) sci-si-units-prefixes giga- 1,000,000,000 times (G) sci-si-units-prefixes tera- one trillion times (T) sci-si-units-prefixes peta- 10 to the 15th (P) sci-si-units-prefixes exa- 10 to the 18th (E) sci-si-units-prefixes yotta- 10 to the 24th (Y) sci-si-units-prefixes yocto- 10 to the negative 24th (y) sci-si-units-prefixes How many millimeters in a centimeter? 10 sci-si-units-prefixes How many centimeters in a meter? 100 sci-si-units-prefixes How many meters in a kilometer? 1,000 sci-si-units-prefixes How many millimeters in a meter? 1,000 sci-si-units-prefixes How many grams in a kilogram? 1,000 sci-si-units-prefixes How many milligrams in a gram? 1,000 sci-si-units-prefixes How many milliliters in a liter? 1,000 sci-si-units-prefixes How many liters in a kiloliter? 1,000 sci-si-units-prefixes How many kilobytes in a megabyte (decimal)? 1,000 sci-si-units-prefixes Base unit of length Meter sci-si-units-prefixes Base unit of mass Kilogram sci-si-units-prefixes Base unit of time Second sci-si-units-prefixes Base unit of volume commonly used Liter sci-si-units-prefixes Base unit of temperature in SI Kelvin sci-si-units-prefixes Base unit of electric current Ampere sci-si-units-prefixes Base unit of amount of substance Mole sci-si-units-prefixes Base unit of luminous intensity Candela sci-si-units-prefixes How many base SI units are there? Seven sci-si-units-prefixes About how long is a meter? A little over 3 feet (39.4 inches) sci-si-units-prefixes About how long is a centimeter? About the width of a fingernail sci-si-units-prefixes About how far is a kilometer? About 0.6 miles sci-si-units-prefixes About how heavy is a kilogram? About 2.2 pounds sci-si-units-prefixes About how heavy is a gram? About a paper clip sci-si-units-prefixes About how much is a liter? A bit more than a quart sci-si-units-prefixes About how much is a milliliter? About 20 drops of water sci-si-units-prefixes What does 1 mL of water weigh? 1 gram sci-si-units-prefixes Volume of 1 cubic centimeter 1 milliliter sci-si-units-prefixes Volume of 1 cubic decimeter 1 liter sci-si-units-prefixes 25 mm equals how many cm? 2.5 cm sci-si-units-prefixes 3 km equals how many m? 3,000 m sci-si-units-prefixes 2 kg equals how many g? 2,000 g sci-si-units-prefixes 500 mL equals how many L? 0.5 L sci-si-units-prefixes 1.5 m equals how many cm? 150 cm sci-si-units-prefixes Celsius to Fahrenheit F = C x 9/5 + 32 sci-si-units-prefixes Fahrenheit to Celsius C = (F - 32) x 5/9 sci-si-units-prefixes Freezing point of water 0 C = 32 F = 273.15 K sci-si-units-prefixes Boiling point of water 100 C = 212 F = 373.15 K sci-si-units-prefixes Normal body temperature About 37 C (98.6 F) sci-si-units-prefixes Room temperature About 20-25 C (68-77 F) sci-si-units-prefixes Convert Celsius to Kelvin Add 273.15 sci-si-units-prefixes Scientific notation for 3,000 3 x 10^3 sci-si-units-prefixes Scientific notation for 0.002 2 x 10^-3 sci-si-units-prefixes Meter was once defined as One ten-millionth of the distance from the equator to the North Pole (1790s idea) sci-si-units-prefixes Which countries use the metric system officially? Almost every country; the US mainly uses customary units in daily life sci-si-units-prefixes What does SI stand for? International System of Units sci-si-units-prefixes Mass vs weight units Mass in kilograms; weight (a force) in newtons sci-si-units-prefixes Density of water 1 gram per cubic centimeter sci-si-units-prefixes Hectare 10,000 square meters sci-si-units-prefixes Metric ton (tonne) 1,000 kilograms sci-si-units-prefixes Angstrom One ten-billionth of a meter, used for atoms sci-si-units-prefixes Micron (micrometer) One millionth of a meter sci-si-units-prefixes Nanometer One billionth of a meter; used for wavelengths of light sci-si-units-prefixes