Lesson 1 Flashcards
A number that shows the size or amount of
something. Usually the number is in
reference to some standard measurement,
such as a meter or kilogram. And therefore,
carrying a unit.
Measurement
The metric system is a system of measurement that uses the meter,
liter, and gram as base units of length (distance), capacity (volume),
and weight (mass) respectively. It is the most convenient system
because its conversion only involves increments of 10.
The English system is a system of measurement that uses the
inch/mile, quarts, and pounds as base units of length (distance),
capacity (volume), and weight (mass) respectively
The English system is a system of measurement that uses the
inch/mile, quarts, and pounds as base units of length (distance),
capacity (volume), and weight (mass) respectively
What is the difference between mass and weight? Or are
they the same
Mass = amount of matter in an object
• Weight = the pull of gravity on an object
• Measured using weighing balances
• Triple beam balance (1 decimal place)
• Top-loading balance (2 decimal places)
• Analytical balance (3 decimal places)
Volume
• Amount of space occupied by an object
• Liquids = graduated cylinder, pipette, beaker
• Regularly shaped solids = length, width, height
• Irregularly shaped solids = water displacement
method
Accuracy indicates how close a measurement is to the true or accepted
value of the quantity being measured.
Precision refers to the closeness of measurements within a set of data. A measure
of how close a series of measurements are to one another
Accuracy refers to the proximity of a measurement to the
true value of a quantity.
• Precision refers to the proximity of several
measurements to each other (Precision relates to the
uncertainty of a measurement)
mixture that has uniform composition throughout
•Every piece of a sample has identical characteristics, though another sample with the same components may have different characteristics. atoms or molecules mixed uniformly
Homogenous
