physical science chp. 3
Terms
undefined, object
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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