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Question 1

Accuracy

Answer 1

A measurement result is considered accurate if it is judged to be close to the true value.

Question 2

Calibration

Answer 2

Marking a scale on a measuring instrument. This involves establishing the relationship between indications of a measuring instrument and standard or reference quantity values, which must be applied. For example, placing a thermometer in melting ice to see whether it reads zero, in order to check if it has been calibrated correctly.

Question 3

Data

Answer 3

Information that has been collected

Question 4

Error

Answer 4

Something unnexpected or incorrect

Question 5

Measurement error

Answer 5

Difference between the measured value and the real value

Question 6

Anomalies

Answer 6

These are values in a set of results which are judged not to be part of the variation caused by random uncertainty.

Question 7

Random error

Answer 7

These cause readings to be spread about the true value, due to results varying in an unpredictable way from one measurement to the next.

Question 8

Systematic error

Answer 8

These cause readings to differ from the true value by a consistent amount each time a measurement is made. Sources of systematic error can include the environment, methods of observation or instruments used. Systematic errors cannot be dealt with by simple repeats.

Question 9

Zero error

Answer 9

An incorrect value of the true zero for a piece of equipment.

Question 10

Evidence

Answer 10

Valid data

Question 11

Fair test

Answer 11

A test where only the independent variable is able to affect the dependent variable

Question 12

Hypothesis

Answer 12

A proposed outcome or result of a test

Question 13

Interval

Answer 13

The quantity between readings

Question 14

Precision

Answer 14

Precise measurements are ones which there is little spread about the mean value

Question 15

Prediction

Answer 15

A prediction on what will happen in the future based on an observation

Question 16

Range

Answer 16

The minimum and maximum values of the independent variable

Question 17

Repeatable

Answer 17

An experiment is repeatable if the same scientist can conduct the same experiment with the same equipment and method and obtain the same results

Question 18

Reproduceable

Answer 18

When an experiment can be carried out by a different person and obtain the same results

Question 19

Resolution

Answer 19

The smallest possible value that can be detected by an instrument

Question 20

Sketch grph

Answer 20

A graph that shows the general relationship between two variables

Question 21

True value

Answer 21

The value that would be obtained in an ideal measurement

Question 22

Uncertainty

Answer 22

The interval with which the true value can be expected to lie

Question 23

Validity

Answer 23

The suitability of the experiment to answer the question being asked

Question 24

Valid conclusion

Answer 24

A conclusion supported by valid data

Question 25

Variables

Answer 25

Quantities or characteristics

Question 26

Categoric

Answer 26

Variables with names as the label

Question 27

Continuous variable

Answer 27

Continuous variables can have a value given by counting or by measurement

Question 28

Control variable

Answer 28

The control variable is one which has the ability to change the dependent variable and so is kept constant

Question 29

Dependent variable

Answer 29

The variable which is measured

Question 30

Independent variable

Answer 30

The variable that is changed to affect the dependent variable