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Biology Test 1
Investigating Scientifically!
17
Biology
10th Grade
02/13/2012

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Term
Independent Variable
Definition
The variable that you change each test.
Term
Dependent Variable
Definition
The dependent variable is changed as a result of the indenpedent variable, it is also the variable that is measured.
Term
Controlled Variable
Definition
The variable you don't change in an experiment.
Term
Qualitative
Definition
Results and data given in words.
Term
Quantitative
Definition
Results and data given in numbers.
Term
The Scientific Method
Definition
- Observations
- Hypothesis
- Prediction
- Test
- Revised Hypothesis ( if possible)
- Repeat (For more accurate results!)
Term
Inference
Definition
An explanation of an observation.
Term
Hypothesis
Definition
Taking only one inference and making a statement out of it.

- Educated guess based on observations prior understanding and research
- About an observant event
- Able to be tested
- Can measured
- Data (reliable and repeatable) can support of disprove it.
Term
If / then formula
Definition
If (independent variable)
Then (Dependent Variable)
Term
Why do we say disproved and not proven?
Definition
Because there might be more data or info that you are not aware of as science can change and a better explanation might become available.
Term
Only variable you change...
Definition
The independent variable, all other variable must be kept the same so no bias is added to the results. Also so we know that the independent variable is the only thing that caused the changes in the results collected.
Term
The Control
Definition
The point of comparison with the experimental group
Term
What should a well designed experiment be?
Definition
It should produce the same result each time carried out. Known as reliability and repeatability.
Term
Systematic Error
Definition
Error with measuring devices, and a constant error that will happen each time.
Term
Random Error
Definition
Errors that don't happen each time, just a mistake you made.
Term
Placebo group
Definition
The group that is told they are getting the independent variable when they are not.
Term
Placebo effect
Definition
When told you are getting the independent variable your body thinks it is as well and you might naturally feel better because of confidence.
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