Pass Check: Working Scientifically
Variables, apparatus, data handling, evaluation and experimental design skills.
Independent variable
The variable that is changed or selected by the investigator.
Control variable
A variable that is kept the same throughout an investigation so it does not affect the results.
Precision
How close repeated measurements are to each other.
Accuracy
How close a measured value is to the true value.
Quick check
Mixed quiz
1. Complete the sentence: A systematic error means the results are ______.
2. Complete the sentence: The resolution of an instrument is ______.
3. Complete the sentence: A result that does not fit the pattern is called an ______.
4. Complete the sentence: Getting similar results when you repeat an experiment shows it is ______.
5. Which piece of apparatus measures the volume of a liquid?
6. Complete the sentence: The variable you measure is the ______.
7. Which instrument measures mass?
8. Which change improves the precision of timing a reaction?