Physics Flashcards
Define validity
Validity refers to whether an experiment or investigation is in fact testing the set hypothesis and aims
Define reliability
Reliability refers to the idea that an experiment can be repeated many times and the average of the results from all the repeated experiments will be consistent
Define accuracy
Accuracy is the ability to obtain the correct measurement. To obtain accurate results, you must minimise systematic errors
Define precision
Precision is the ability to consistently obtain the same measurement. To obtain precise results, you must minimise random errors
Define risk assessment
Risk Assessment determines the risks of an experiment and the means of damage and controlling it
Recall the features of a risk assessment
Features of a risk assessment:
- Risk
- Hazard
- Control
Alternatively,
- Identify
- Assess
- Control
Error formula (percentage)
(experimental value - true value) / true value|
Explain how to improve the validity and how to assess the validity
The validity can be improved by controlling variables and hence, the validity can be assessed through whether it is relevant to the aim or hypothesis, reliability, and accuracy
Explain how to improve the reliability
Minimise errors
Explain how to improve the accuracy
Minimise errors
Explain how to improve the precision
Minimise errors
Explain what motion involves
Motion involves velocity and acceleration
