The maximum and minimum values of the independent or dependent variables. For example a range of forces may be quoted as either: "From 0 N to 20 N" or "From 20 N to 0 N"

Organs or cells able to respond to light, heat, or other external stimuli and transmit signals to sensory nerves.

A measurement is repeatable if the original experimenter repeats the investigation using same method and equipment and obtains the same results

A measurement is reproducible if the investigation is repeated by another person, or by using different equipment or techniques, and the same results are obtained.

This is the smallest change in the quantity being measured (input) of a measuring instrument that gives a perceptible change in the reading

A process which estimates the likelihood that exposed people may have health effects. The four steps of a risk assessment are: hazard identification (Can this substance damage health?); dose-response assessment (What dose causes what effect?); exposure assessment (How and how much do people contact it?); and risk characterization (combining the other three steps to characterize risk and describe the limitations and uncertainties).

The process of deciding how and to what extent to reduce or eliminate risk factors by considering the risk assessment, engineering factors (Can procedures or equipment do the job, for how long and how well?), social, economic and political concerns.

A highly contagious viral disease, spread through contact with discharges from the nose and throat of an infected person