In a science experiment, we will often have the following variables:
Independent Variable: what you change.
Dependent Variable: what you observe changing.
Controls: what you keep the same to ensure a fair test.
What are the errors and uncertainties in making measurements?
The following are some of the types of errors that can occur in an experiment.
Resolution: the smallest change that can be measured by a piece of equipment.
The uncertainty in a reading is usually the same as the resolution of the equipment used.
Error: the difference between the measured value (reading) and the true value.
Random Error: an error caused by factors that vary between readings (e.g. reaction time).
Uncertainty in a mean = range/2
Parallax Error: error that can be cause by observing apparatus at an angle.
Systematic Error: an error that causes every reading to be different from their true values by the same amount.
Zero Error: a systematic error caused by equipment not being calibrated or ‘zeroed’ before measuring.
Try the free Mathway calculator and
problem solver below to practice various math topics. Try the given examples, or type in your own
problem and check your answer with the step-by-step explanations.
We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.