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Chem Ch 3
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10
Chemistry
11th Grade
10/05/2012

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Term

 

Qualitative measurements
Definition

 

give results in a descriptive, nonnumerical form.
Term

 

Quantitative measurements
Definition

 

give results in a definite form, usually as numbers and units.
Term

 

Scientific Notation
Definition

 

a number is written as the product of two numbers: a coefficient and 10 raised to a power.
Term

 

Accuracy
Definition

 

Fa measure of how close a measurement comes to the accepted actual value for that measurement.
 
Term

 

Precision
Definition

 

a measure of how close a series of measurements are to each other
Term

 

Absolute error
Definition

 

a measure of how close you are to the accepted value for a set of measurements
Term

 

accepted value
Definition

 

a value that is assumed to be true from several scientific tests
Term

 

experimental value
Definition

 

Fthe value that you came up with when you went to the lab in the back of the room and did the experiment.
 
Term

 

Percent error
Definition

 

F
[absolute error]  x  100% 
accepted value
 
Term
Significant Figures
Definition

 

all of the digits that are known plus an estimated digit
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