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31 Cards in this Set
- Front
- Back
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Classification |
The grouping of organisms based on similarity of their characteristics |
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Hypothesis |
A possible explanation to account for observations |
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A Control |
A procedure carried out to give a comparison in an experiment |
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Variable |
Any factor that may change during an experiment |
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Independent Variable |
in an experiment, the factor that is being investigated. |
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Dependent Variable |
In an experiment, the factor that changes in response to changes in the independent variable. |
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Controlled Variables |
Variables that are controlled in an experiment |
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Placebo |
An inactive substance that looks like real medication used in medical experiemts |
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Objectivity |
Not allowing your thoughts or feelings to influence how you record or interpret observations |
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Validity |
The extent to which an experiment tests what it is supposed to test |
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Uncontrolled Variable |
Factors in an experiment that are not kept the same between the control and the experimental set-up |
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Reliability |
The extent to which an experiment gives the same result each time it is performed |
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Repetition |
Performing the same experiment many times |
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Verification |
Repeating and checking an investigation to ensure there are no errors or bias |
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Data |
Observations and measurements; the results of an experiment |
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Table |
An organised and concise means of presenting data |
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Graps |
A visual way of representing data so it is easy to see trends and make predictions |
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Average |
The total measurements in a group divided by the total number of measurements. |
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Arithmetic Mean |
Alternative name for 'mean' |
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Outliers |
Measurement well beyond the range of the rest of the measurements in the set |
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Ratio |
A numerical statement of how one variable relates to another |
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Per cent |
Per Hundred |
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Rate |
A ratio that shows how long it takes to do something |
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Frequency |
The number of times an event occurs |
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Frequency Distribution |
A table summarising data by showing how often a variable occurs; AKA Frequency Table |
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Observations |
The use of the senses, sometimes with instruments that enhance the senses, to gather information |
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Placebo Effect |
A change or improvement in patients who are given a placebo or 'dummy' treatment |
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Ethics |
Moral principles or values |
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Random Errors |
An error in an experiment due to limits to the precision of the measurement |
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Systematic Errors |
An error that occurs in an experiment because of the way the experiment was designed. |
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Ethical Behaviour |
Behaviour that conforms to a set of moral principles or values |
