AQA GCSE Science - Science Key Words
Terms in this set (28)
Accuracy / Accurate
A measurement is that is close to the true value.
Results that do not follow the general pattern. They are not part of the variation caused by random uncertainty.
When one answer is favoured over another, leads to unreliable results.
Variables with values that have labels or names, not numbers.
Variables with values that can be counted or measured.
Variables that should be kept the same (or monitored) in an investigation.
The outcome you measure in an investigation.
When the dependent variable increases by the same amount that the independent variable increases by. They show a straight line graph.
An investigation that only has one independent variable that will affect the dependent variable.
A research statement. (Changing ____ will affect ___. / How does ____ affect ___?)
The variable you change in the values of in an investigation.
The difference between individual readings.
The difference between a measured value and the true value.
Measurements that are very close to the mean value. Depends only on the extent of random errors.
A statement that suggests what will happen in an investigation.
Results based on observations made.
Results based on measurements taken, results are numbers.
Differences in results that can be reduced by taking more measurements and calculating a mean.
The minimum and maximum values of the independent variable. (From ___ to ___)
Results that are the same when you do the experiment again, using the same method and equipment.
Results that are the same when another group does a similar experiment using different equipment.
The smallest interval of a measurment tool.
Differences in results that are caused by the instrument you use, the environment, or the method of observation. Can only be reduced by using a different method or equipment.
The value that you would expect if the results were collected in an ideal measurement.
The interval of data that you would expect to find the true value in.
How suitable a method is to answer the reseach question. An investigation that has suitable controlled variables.
Quantities or characteristics that can be changed in an investigation.
A measurement tool that does not read zero when expected. Examples include the needle of an ammeter not returning to zero when not current will flow. They are examples of systematic error.