Explore area with square inches and centimeters. Engage in a Number Talk. Explore area with square inches and centimeters. How can we use square inch tiles and centimeter cubes to compare the area of ...

Speed is a measure of how fast something is travelling. The speed of an object is how far the object travels in one unit of time. The formula for speed is: \(\text{speed} = ...

Before measuring something, it is important to know which unit to use. Estimating its approximate size by comparing it with a more familiar object can help. In order to find a suitable unit of measure ...

Why are there 5280 feet in a mile, and why are nautical miles different from the statute miles we use on land? Why do we buy milk and gasoline by the gallon? Where does the abbreviation “lb“ come from ...

If scientists had sacred objects, this would be one of them: a single, closely guarded 137-year-old cylinder of metal, housed in a vault outside of Paris. It is a prototype that precisely defines a ...

Meters, kilograms, degrees Celsius. To most Americans, these units of measurement are little more than funny inconveniences on trips abroad. To scientists, they’re the very standards that allow for ...