The scale of the universe is bigger than you can imagine. It is also smaller than you can imagine. The smallest lenth theorized to be possible, the Planck length is about 4 X 10^-35 meters. Just imagine...

In this video, the teacher uses metric conversions to solve a standardized math test question that involves calculating distances walked by three individuals in kilometers and meters. The teacher explains the concept of metric units and...

This nugget shows how to estimate quantity of liquids in terms of litres and compare capacity in terms of half, twice and three times.