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# chem 2210 cp 1.2

a greek philosopher who thought that the best way to learn about reality was not through the senses, but through reason Plati (427-347BCE)
a physician and an alchemist who thought that alchemy should be about preparing new medicines Paracelsus ( 1493 - 1541)
a french chemist who studied combustion, made careful measurements of the mass of objects before and after burning them in closed containers antoine lavoisier (1743 - 1794 )
a statement based on direct experience fact
a statement that is proposed, without actual proof, to explain a set of facts or their relationship hypothesis
the formulation of an apparent relationship among certain observed phenomena, which has been verified to come extent theory
the process of observation, hypothesis, and experimentation used to expand a body of knowledge scientific method
observations that are descriptions of what you observe qualitative
observations that are measurements that include both a number and a unit quantitative
a concise statement of a relationship between phenomena that is always the same under the same conditions law
mass, volume, temperature, density, and other physical properties are called ______ physical quantities
a defined quantity used as a standard of measurment unit
(SI) mass is measured in kilograms (kg)
(SI) length is measured in meters (m)
(SI) volume is measured in cubic meters (m^3)
(SI) temperature is measured in kelvins (k)
(SI) time is measured in seconds (s)
(MS) mass is measured in grams (g)
(MS) length is measured in meters (m)
(MS) time is measured in seconds (s or sec)
(MS) temperature is measured in degrees Celcius (c) or Kelvins (K)
(MS) amount of a substance mole (mol)
(MS) volume is measured in cubic centimeters (cc or cm^3) or liter (l)
writing a number as the product of a number between 1 and 10 multiplied by 10 raised to some power scientific notation
a measure of the amount of matter in an object mass
a measure of the gravitational force that the earth or other large body exerts on an object weight
the volume of a cube whose dimensions are 1 cm on each side cubic centimeter
a ratio of equivalent quantities used to express a quantity in different units conversion factor
counted or given by definition exact
numbers depends on how they were determined inexact (measured)
have no uncertainty associated with them exact numbers
the recorded digits, both certain and uncertain significant figures
Created by: mt443417