What is the independent variable?
The factor that is being investigated and deliberately changed to determine its effect on the results
Also known as the experimental variable or the manipulated variable.
What is the dependent variable?
The factor that changes due to the changes made to the independent variable
Also referred to as the responding variable.
What are controlled variables?
The factors that are kept the same for both the control and experimental groups in an experiment.
What does the accuracy of the results refer to?
How correct or true the measurements are to the accepted value
What is the definition of reliability of the results?
How similar the results for trials of the same test are.
Reliable results can be identified by conducting multiple trials and comparing the measurements.
How can the reliability of results be increased?
By conducting multiple trials, controlling variables, and using appropriate equipment.
If the method is followed correctly each time, the reliability is enhanced.
How to make results accurate
Use correct measuring equipment
What determines the validity of a method?
A valid method will fairly test the hypothesis so that the only factor affecting the results is the independent variable.
We can trust results of a valid method
What are random errors, and how to reduce
Errors that occur because not every measurement is precise
Conduct multiple trials
What is systematic error
Error due to experiment design or equipment
What is human error, and how to reduce
Human mistake - prevent with proper care
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Scientific Method11
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Cells Make up the Human Body [2]41
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Cells Undergo Chemical Reactions [3]43
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The Respiratory System [4]35
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The Circulatory System [5]91
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The Digestive System [6]61
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The Excretory System [7]58
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The Musculoskeletal System [8]64
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DNA [9]43
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Cell Division [10]51
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The Reproductive System [11]70
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Reproduction Produces Offspring [12]110
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Contraception & STIs [13]67
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Assisting Reproduction [14]38
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Genetics [15]52
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Chapter 9 (john making caz making=learning)51
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Chapter 10 (john making caz making=learning)95
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Chapter 11 (John Making caz114
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Chapter 12 (John making for learning)116
