Measurement helps us know the exact size of things instead of guessing. To measure length we use a ruler or tape measure, and the common units are «centimeters» and «meters». One meter equals one hundred centimeters.
To measure weight we use a scale, and the common units are «grams» and «kilograms». One kilogram equals one thousand grams. For example, a small apple might weigh about a hundred grams, while a bag of potatoes might weigh a full kilogram.
To measure time we use a clock, and to measure liquids we use «liters». It is important to use the right unit for each type of measurement so the result makes sense to everyone.
