MEASUREMENT AND METRICSHolt: Ch. 1, Sect. 4

TOOLS IN SCIENCE

THE INTERNATIONAL SYSTEM OF UNITS (SI)

Ancient measurements were based on: (1) body parts, such as hands and feet (2) food, such as barley

International System of Units (SI) system was developed by French scientists in the 1700s. Simple and reliable Also known as the metric system Multiples of ten Prefixes

KING HENRY DIED IN SPACE DRINKING CHOCOLATE MILK

LENGTHBase unit is meter (m)

An Olympic-sized swimming pool is 25 m x 50 m

Distance from King George to Fredericksburg is 30 kilometers (km)

A standard piece of copy paper is approximately 22 centimeters x 28 centimeters (cm)

MASS The amount of matter in an object Base unit is gram (g) 1000 kg = 1 metric ton

The mass of a standard tennis ball is between 57-59 g.

A standard Mini Cooper has a mass of between 1510-1690 kilograms (kg).

The mass of a regulation ping pong ball is 2700 milligrams (mg).

VOLUME The amount of space something occupies

Liquid volume is expressed with base unit liter (L)

****Meniscus

Solid volume is usually expressed in cubic meters (m3) How do we calculate volume? 2-D? 3-D?

2L

TEMPERATURE A measure of how hot (or cold)

something is; specifically, a measure of the average kinetic energy of the particles in an object

SI unit is Kelvin (K), we will use Celsius (˚C)