INTRODUCTION TO MEASUREMENT MRS DAnton MEASURING UP In

INTRODUCTION TO MEASUREMENT MRS. D’Anton

MEASURING UP In the 1790’s, a group of scientists came to the first general agreement that using a single, worldwide system of measure would benefit all people. This system was named the metric system, and it gave us units of measure like meters and liters. The system was formally, and more universally, adopted in the 1960 s when it became the International System of Units, or SI system. The “SI” comes from the French name Le Systèm International d’Unités. For example, the SI scale of temperature is called Celsius, and it places the freezing point of water at 0 o. C and the boiling point of water at 100 o. C. What are some of the reasons why defining a temperature scale by the freezing and boiling points of water might be useful to scientist on any part of the earth? 4

PAIR & SHARE Talk to the person next to you and try to give directions from the school to the Rockaway Mall qualitatively, without, using any units or numbers.

QUALITATIVE VS. QUANTITATIVE - A quantity is something that has magnitude, size, or amount - A unit is a quantity adopted as a standard of measurement 3 apples and 1 orange 43 m. L

MEASUREMENT PRACTICE MENISCUS

SI SYSTEM - Since 1960, scientists worldwide have used a set of units called the SI system. - Using the same units ensures that the standard is reproducible anywhere on earth and make communicating measurements easier!

SI PREFIXES Prefix Abbreviation Meaning Example Kilo- k 1000 1 km – 1000 m Hecto- h 100 1 hm – 100 m Deka- da 10 1 dam – 10 m Deci- d 1/10 1 dm - 0. 1 m Centi- c 1/100 1 cm - 0. 01 m Milli- m 1/1000 1 mm - 0. 001 m