physical science chp. 3
Terms
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 meniscus
 curve seen at a liquid's surface, especially in a graduated cylinder
 spring scale
 an instrument for measuring weight
 metric system
 a decimal system of measurements based on the meter; SI
 second

the basic unit of time;
9,192,631,770 vibrations of a cesium atom  newtons (N)
 the metric unit of weight
 balance
 an instrument for measuring mass
 volume

any space defined by length, width, and height
volume=length x width x height
v=lwh  mass
 the quantity of matter in an object
 meter (m)
 the basic unit of length of the metric system; 39.37 inches
 liter (L)
 the volume of a cubic decimeter
 significant digits (figures)

all of the certain digits plus one doubtful digit in
a measurement  density

the mass in a unit of volume
density=mass/volume
d=m/v  law of mass conservation
 in all chemical and physical changes, matter is neither created nor destroyed
 weight
 the measure of the force of gravity on an object
 water displacement method
 measuring the volume of an irregularly shaped object by submerging it in water contained in a graduated cylinder and taking before and after measurements
 unit analysis
 a mathmematical tool to convert between units
 units
 descriptive notes that accompany numbers

SI or Systeme International
(French for International System)  the systematized units of the metric system; time (second), temperature (Kelvin), electrical current (ampere)which simplifies and standardizes all scientific work
 kilogram (kg)
 the mass of a liter of water; 1000 grams
 scientific notation
 using the power of 10 to express very large or very small numbers