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Apologia Chem M 1A

Measurement, Units, and the Scientific Method

QuestionAnswer
matter anything that has mass and takes up space
light is not considered matter, as it does not have mass OR take up space
The first thing we have to be able to do to study matter is to measure it.
If you answer a question or solve a problem and do not list the units with the numbers, your answer will be considered incorrect.
metric system a system of standard units, more logical and versatile than the English system
gram metric unit for mass
mass measures HOW MUCH matter exists in an object
weight measures HOW HARD gravity pulls on an object
slug English unit for mass
Newton English unit for weight
meter metric unit for distance
liter metric unit for volume
gallon English unit for volume
foot English unit for distance
second English and metric unit for time
centi- (c) one-hundredth
kilo- (k) 1,000
metric system prefixes mean the same thing regardless of the physical quantity being measured
milli- (m) one-thousandth
factor-label method a method of conversion using the multiplication of fractions
1.00 inch 2.54 cm
1.00 slug 14.59 kg
1.00 gallon 3.78 kg
When adding or subtracting units, the units we are using must be IDENTICAL.
When multiplying or dividing units, it does not matter whether the units match.
derived units derived from math calculations based on basic units that make up the metric system
1 cubic cm 1 mL (or 1 cc)
Created by: MrsHough
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