Key Words

Question 1

Accuracy

Answer 1

How close the measurement is to the true value

Question 2

Calibration

Answer 2

Marking a scale on a measuring instruments et put instrument in a known measurement and make sure it’s the same eg water potential or absorbency of distilled water

Question 3

Data

Answer 3

Information that is either qualitative or quantitative

Question 4

Errors

Answer 4

Uncertainties in data sets

Question 5

Measurement error

Answer 5

The difference between the measured value and the true value

Question 6

Anomalies

Answer 6

Values that are not part of the variation of the whole data set caused by random uncertainties

Question 7

Random error

Answer 7

Results vary in an unpredictable way each time the effect of random errors can be reduced by finding more measurements and making mean

Question 8

Systematic error

Answer 8

Reading differ from the true value by a consistent amount each time,can be due to environment, the instruments being used

Question 9

How reduce systematic errors

Answer 9

Repeat data collection using different technique of set of equipment

Question 10

Zero error

Answer 10

When a measuring tool gives a false reading when the true vs,I’d of a measurement is zero eg when no weight on scales not at zero

Question 11

Evidence

Answer 11

Data that has shown to be valid

Question 12

Fair test

Answer 12

Where only the independent variable has effected the dependant variable

Question 13

Hypothesis

Answer 13

An initial prediction of how the IV will affect the DV

Question 14

Interval

Answer 14

The quantity between readings they should be equally spaced

Question 15

Precision

Answer 15

The amount of variation the data shows from the mean the more precise the closer the data to the mean

Question 16

Prediction

Answer 16

A statement suggesting what will happen in the future based on an observation or hypothesis

Question 17

Range

Answer 17

The maximum and minimum values if the independent if dependant variables

Question 18

Repeatable

Answer 18

The original experimenter repeats the experiment using same method and equipment getting the same results

Question 19

Reproducible

Answer 19

If different experimenter repeat or different technique or equipment is used to get the similar findings

Question 20

Resolution

Answer 20

The smallest change in the quantity being measured of a measuring instrument

Question 21

Sketch graph

Answer 21

A line graph that shows the relationship between two variables axis maybe labelled but not scaled just to show correlation type and strength

Question 22

Uncertainty

Answer 22

The interval within which the true value can be expected to lie with a given level of confidence or probability

Question 23

Validity

Answer 23

Whether the experimenter is measuring what they set out to measure and whether the findings answer the initial questions

Question 24

Valid conclusion

Answer 24

A conclusion supported by valid data obtained from appropriate experimental design

Question 25

Variables

Answer 25

Physical, chemical or biological quantities or characteristics

Question 26

Categoric variables

Answer 26

Have va,he’s that are labels eg names of plants

Question 27

Continuous variables

Answer 27

Ones that have values that can be valued ie counted or measured eg light intensity

Question 28

Control variable

Answer 28

Variables that have to be kept constant that may effect the outcome of experiment

Question 29

Dependant variable

Answer 29

The variable that is being measured at each change of the IV to see whether effected

Question 30

Independent variable

Answer 30

The variable that is changed to see it effect in the dependant variable

Question 31

Nominal variable

Answer 31

A type of categorical variable in which there’s no order to eg colours of flowers