The metric system is an international standard of measurement used by almost all countries. Scientists use the metric system throughout the world so that they can share results.
Common units in the metric system:
Length - mm (millimeter) cm (centimeter) m (meter) km (kilometer)
Mass - mg (milligram) g (gram) kg (kilogram)
Temp - •c (degrees celsius)
Volume - L (liter) mL (milliliter)
In order to practice using the metric system, these images show a ruler measuring cm (centimeters) placed next to several objects.
What is the length in cm (centimeters) of the boat?