Unifying Concepts and Processes Newton's discovery of the universal nature of the force of gravity was remarkable. To take the familiar force that makes an apple fall to Earth and be able to recognize it as the same force that keeps the planets on their quiet and predictable paths represents one of the major achievements of human intellectual endeavor. This ability to see beyond the obvious and familiar is the mark of a true visionary. Sir Issac Newton's pioneering work epitomizes this quality. Many dictionaries and mathematics and science textbooks provide conversion tables between the metric system and other systems of measurement.
Units conversion is very important in all areas of life.
For example in currency exchange, airplane navigation, and scientific research. Unifying Concepts and Processes Scientific notation makes it easier to read, write, and manipulate numbers with many digits. This is especially useful for making quick estimates and for indicating the number of significant figures.