Which of the following conversions is INCORRECT?

The correct conversion is 1 kilometer = 1000 meters. In the metric system, the prefix "kilo-" means 1000. This means a kilometer consists of 1000 meters, not 100. The other conversions are correct: 1 meter equals 100 centimeters, 1 kilogram equals 1000 grams, and 1 liter equals 1000 milliliters. Understanding these fundamental conversions is crucial for accurate calculations in various scientific, engineering, and everyday applications. Errors in unit conversion can lead to miscalculations, which may affect measurements in fields such as construction, medicine, and physics, where precision is essential for correct results.