Biology mod 0
Terms
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- Biology definition
- study of the structure, function and development on living things
- Generalisations
- statements supported by evidence which generally apply (there can be contradictions)
- theories
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•develop from hypotheses/generalisations
•represent scientific evidence as it is know at present
•can change when new observations or evidence refutes the widely accepted idea of scientists - models
- presentations of phenomena
- laws
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•develop when generalisations/theories can be applied to all known cases, without exception
•can be used to predict future phenomena - Scientific method
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1. observations (anything detectable)
2. Inferences
3. Hypothesis (testable idea) A causes B
4. Predictions
5. Experiments
6. Collect & analyse data
7. Repeat - Independent variable
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•is deliberately manipulated
• aka experimental variable
•eg. group A is different from group B because of the experimental variable - Dependent variable
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•is the variable that changes as a response to the independent variable
• is what you measure and observe in the experiment
•aka responding variable - controlled variables
- •those variables that are regulated and kept constant for the duration of the experiment
- Uncontrolled variables
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•are those factors which are not considered in the experimental design
•should not have any significant effect on the experiment - sample size
- •larger the better as it increases the reliability of the outcome as it is an attempt to even out the individual variation that exists between the subjects