Measuring and Units 1 All slides in this section contain: Clipart.com items: 8260752, 7804277 The Dominion Mandate requires us to gain knowledge about God?s creation. To do so, we must take measurements. Measurement measurement the act of comparing an unknown quantity to a standard unit When you write a measurement ? You must have a number. You must have a unit. (How much information does the statement ?I ran 7? give you?) instrument a device to aid in measuring Is accurately subdivided Is calibrated Instrument Has units on a scale Started with the metric system. Expanded to SI. SI System (International System of Units) We will use 5 of these. There are 7 base units. SI System (International System of Units) base units units that do not come from other units Chemistry Base Units