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Syringe
An appropriate piece of equipment used for measuring small volumes.

Absolute uncertainty
It has a higher resolution and will therefore result in a lower percentage uncertainty.
Interpreting volumes
To work out uncertainty you must find the smallest increment of measurement on your measurement device and then divide it by two.
Precision
How close the agreement is between several measured values.
Accuracy
How close a reading is to the true value.
Quantitative observations
Numerical observations, for example, length or time.
Qualitative observations
The only value that should be changed throughout an experiment.
Dependent variable
This is the variable that is measured to determine the result of the experiment.
Control variable
Any values that affect the result of your experiment should be controlled or monitored.
Mean
The sum of all the values divided by the number of values in the data set.
Median
The middle value when the data is ranked.
Mode
The value that occurs most often in a data set.
Standard deviation
A measure of the average.
Anomaly
A result that deviates from what is standard or expected.
Evaluating data
Methods of evaluating data include checking for anomalies and assessing precision and accuracy.
Control experiment
A test conducted exactly the same as the test experiment, but with the factor causing the change removed.
Stop clock/watch
Used to measure time.
Thermometer or data logger
Used to measure temperature.

Indicator paper, indicator solution, data logger/pH metre
Used to measure pH.
Risk assessment
Identifying potential hazards and their consequences.
Reliable sources
Sources that are credible and free from bias.
Referencing
Citing sources by stating their surname and publication date.
Colorimeter
Measures light absorbance or light transmission of a substance.
Potometer
A piece of apparatus designed to measure water uptake in a leafy shoot.