Aice marine 1

Qualitative data

Qualitative data

Descriptive data about a variable

Precision in measurements

This refers to the closeness of the measurements to each other

Continuous data

One which can take any data

Bar chart

A graph which is drawn to show the relationship between one continuous and one discontinuous variable

Variable

A condition in an experiment that can be controlled or changed

Water bath

A container of water heated to a given temperature which can be used to either vary or control the temperature

Independent Variable

Variable being changed in an experiment

Confounding Variables

A variable that could effect the independent or dependent variable and therefor the result of the experiment

Hypothesis

An explanation of an observation that can be tested through experimentation

Accuracy

Ensuring that measurements are close to the true value

Histogram

A graph which is drawn to show the frequency of one continuous variable

Discontinuous variable

One which can only take certain values

Control variables

Variables that are not being tested but must be kept the same in case they affect the experiment

Systematic error

A consistent variable which affects each measurement in the same way, normally caused by faculty measuring equipment or difficulties in reading that equipment

Random error

an error in measurement which is caused by factors which vary from one measurement to another

Dependent Variable

The variable being measured in an experiment

Control experiment

A group within an investigation or study that receives exactly the same treatment as the experimental groups with the exception of the variable being tested

Prediction

A statement of the expected results in an experiment based on the hypothesis being tested

Line graph

A graph which is drawn to show the relationship between two continuous variables

Quantitative data

Numerical data that finds the quantity, amount of range of the variable

Precision in measurements

the level of refinement in a measurement as shown by the number of significant figures given

Buffer

A solution which can maintain a relatively stable pH

Theory

a well-substantiated explanation of some aspect of the natural world that has been repeatedly tested and confirmed through observation and experimentation

Reliable

results that can be replicated by other people

anomaly

A result or observation that deviated from what is normal or expected