The document defines common units of measurement for time, length, mass, and capacity. It notes that there are 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day, and 365 days in a year. For length, it provides conversions between millimeters, centimeters, meters, and kilometers. Conversions are also given for milligrams, grams, and kilograms for mass, and milliliters, liters, kiloliters, and megaliters for capacity. The document encourages visiting an online resource for more information.