Science Vocabulary

Science Vocabulary

Vocabulary for GCSE ISA - words that might come up in the exam! (Most of these words are to do with data.)

published on December 05, 201316 responses 0

What is a measurement error?

The difference between a mushroom violin and a true violin.
The difference between a measured value and a true value.
The difference between a measured or a true value.

This is the value that would be obtained in an ideal measurement. This would be a...

Uncertainty
Range.
True Value.

What is calibration?

A process you do to check everything is as it should be.
A process that makes your phone go weird.
Something that eats cake.

Precise measurements are ones in which there is very little spread about the mean value. This would be a...

Range.
Precision.
Independent Variable.

What does "repeatable" mean?

A result that has the same answer when the original experimenter does the same investigation again using the same method and equipment.
A test that has been done by another person, using different equipment or techniques but they get the same results.
The smallest change in the quantity being measured (input) of a measuring instrument that gives a perceptible change in the reading.

What does "range" mean?

The maximum and minimum values of the independent or dependent variables; important in ensuring that any pattern is detected. E.g. from 50-10cm or from 10-50cm.
How big and small something is.
The maximum value of an independent variable.

The quantity between readings, e.g. a set of 11 readings equally spaced over a distance of 1 metre would give an interval of 10 cms. This would be an...

Precision.
Prediction.
Interval.

What is zero error?

An error that occurs when there is a false measuring reading, e.g. when the needle of an ammeter does not go back to zero even when the current is stopped.
A reading that differs from the true by a consistent amount each time a new measurement is made.
Santa eats your Christmas pudding , so there is no pudding - zero pudding.

What is a systematic error?

An error having a non-zero mean, so that its effect is not reduced when observations are averaged.
An error that occurs when there is a false measuring reading, e.g. when the needle of an ammeter does not go back to zero even when the current is stopped.
A reading that differs from the true by a consistent amount each time a new measurement is made.

How do you draw a sketch graph?

A perfect graph, nothing wrong at all.
Draw a line that is not necessarily on the grid that shows the general shape of the relationship between two variables. Do not have any points plotted and although the axes should be labelled they may not be scaled.
A random graph that doesn't relate to anything.

What is a measurement error?

The difference between a measured value and a true value.
The difference between a cake and a pie.
Something the ruler measured wrong.

Define uncertainty.

The interval in which the true value can be expected to be a lie.
Something you don't know at all.
Something that is right.

What are the control, dependent and independent variables?

Some random things that I don't need to know.
*Control - things you keep the same.
*Independent- the things you change.
*Dependent - the changes in the independent variables, which you measure.
Variables that are cool.

What is this the definition of...
Suitability of the investigative procedure to answer the question being asked. For example, an investigation to find out if the rate of a chemical reaction depended upon the concentration of one of the reactants would not be a valid procedure if the temperature of the reactants was not controlled.

Resolution.
Validity.
Continious.

What is a prediction?

What will definitely happen no matter what.
A thing you eat.
A statement suggesting what will happen in the future, based on observation, experience or a hypothesis.

A continuous variable is what?

A variable that can be given a great size by either counting or by measurement. (Goes on forever.)
Just some random thing that stops when it feels like it.
A variable that is only one unit.

What is the difference between a valid conclusion and an non-valid conclusion?

A valid conclusion is supported by valid data, and is obtained from a appropriate experiment. Whilst a non-valid conclusion is not supported by anything nor is relevant to the experiment.
A valid conclusion is supported by data, and is obtained from a random experiment. Whilst a non-valid conclusion is not supported by a relevant experiment.
A valid conclusion is lovely, whilst a non-valid one is OK.

What is the definition of "reproducible"?

A conclusion supported by valid data, obtained from an appropriate experimental design and based on sound reasoning.
A line graph, not necessarily on a grid, that shows the general shape of the relationship between two variables. It will not have any points plotted and although the axes should be labelled they may not be scaled.
A test that has been done by another person, using different equipment or techniques but they get the same results.

What is random error?

An error in measurement caused by factors which vary from one measurement to another.
An error having a non-zero mean, so that its effect is not reduced when observations are averaged.
An error in eating mince pies.