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Bio Vocab
2.2 Key Vocab
7
Biology
10th Grade
01/05/2012

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Term
Hypothesis
Definition
• A suggested, testable answer 
to a well­defined scientific
question. 
– Must be supported by
observations and data
Term
Prediction
Definition
•  A proposed outcome based
on a given hypothesis. 
– Usually stated in the form of an 
IF  THEN statement
Term
Experiment
Definition
•  A procedure designed to test 
the validity of a given
hypothesis
Term
Variable
Definition
• A factor or condition which 
could affect the results of an 
experiment
Term
Experimental Group
Definition
• A set or group in an
experiment which has or is
given the condition the 
experiment is designed to test. 
– This group is the one that is
“different” from the normal 
condition
Term
Control Group
Definition
•  A set or group in an experiment 
which has or is given the 
contrasting condition to the one
the experiment is designed to 
test.
– This group is used as a
comparison to measure the effect of
the experimental variable
Term
Controlled Experiment
Definition
• An experiment that limits the 
effects of variables so that only
one variable is being tested
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