Warm UPWhat does the mnemonic device,

ROGERS stand for?If you are living you will

RespondOrganized

Grow and DevelopEnergy

ReproduceSimilar Chemicals/Adapted to

Surroundings

Scientific Process Skills Measurement• Measurements help us to quantify objects. • We seek questions to answer such as, “How much?” “How Far?” “How big?”

or “What size?”.• There are two systems of weights and measurements that exist in the U.S.

today.• 1. The U.S. Customary System (inches, feet, ounces, pounds Etc. …..)• *Scientist do not like to use this method because it is not

based on one standard and the US alone uses this system.• 2. The International System of Units (SI)• (liters, meters, grams) convenient because unit sizes vary by

multiples of ten. • All countries use this system of measurements.• International System, SI, provides standard measurements that all scientist

around the world can understand.• Metric System

– Developed in 1795– Adopted as international system of measurement in 1960.

This is the metric conversion stair chart. You basically take a place value chart turn it sideways and expand it so it looks like stairs. The Latin prefixes literally mean the number indicated. Meter, liter or gram can be used interchangeably. You use this chart to convert metric measurements like this:

each time you go up a step

orMove decimal

left

each time you go down a step or

move decimal right

• Length– Metric rulers– Meters

• Liquid– Volume – Liters – Graduated cylinders/beakers

• Weight– Mass – Grams– Triple beam balance

• Temperature– Celsius

cmmm

The triple beam balance is a rugged, inexpensive weighing instrument. It is named for the three beams which carry weights.

A. The middle beam reads only in 100 g increments.B. The far beam reads only in 10 g increments.The weights in each of these must always sit in a "notch". C. The weight on the front beam can be placed to read continuously from 0 to 10 grams.

=

beaker

212

32

100

Celsius

0