Keywords

Question 1

Data

Answer 1

Measurements or information you collect during your investigation

Question 2

Mean

Answer 2

Calculated by finding the sum of the values and dividing by the number of values

Question 3

Range

Answer 3

Highest and lowest vales

Question 4

Intervals

Answer 4

Gap between the readings

Question 5

Independant variables

Answer 5

Thing that you deliberately change

Question 6

Dependant variables

Answer 6

The thing that you measure

Question 7

Control varibale

Answer 7

The thing you keep the same to make it a fair test

Question 8

Fair test

Answer 8

Only the independant variable changes

Question 9

Categoric variables

Answer 9

Have word labels and cannot be placed in order, plotted on a bar chart

Question 10

Continuous variables

Answer 10

Have any numeric value, plotted on a line graph

Question 11

Hypothesis

Answer 11

Suggestion to explain facts or observations

Question 12

Prediction

Answer 12

Suggestion of what will happen based on an observation or hypothesis

Question 13

Repeatable

Answer 13

Do the same experiment again, with same method and equipment and results

Question 14

Reproducible

Answer 14

Same results obtained by somebody else or using a different technique

Question 15

Bias

Answer 15

Someone’s opinion is due to favouritism or hidden interest

Question 16

Valid

Answer 16

Only if a fair test and no bias

Question 17

Evidence

Answer 17

Data which is considered valid

Question 18

Secondary evidence

Answer 18

Data collected from somebody else

Question 19

True value

Answer 19

Correct value to be found without errors

Question 20

Uncertainty

Answer 20

Range which the true value is expected to be

Question 21

Random error

Answer 21

Cause readings to be spread about the true value, cannot be corrected but reduced by taking more measurements

Question 22

Systematic error

Answer 22

Results are consistently higher or lower than true value

Question 23

Zero error

Answer 23

Caused by instruments that have a false zero

Question 24

Measurement error

Answer 24

Difference between a measured value and true value

Question 25

Anomalies

Answer 25

Results that are strange and not just random errors

Question 26

Calibration

Answer 26

Fixing known points and them marking a scale on a measuring instrument between fixed points

Question 27

Accuracy

Answer 27

Measurement close to the true value

Question 28

Presicion

Answer 28

Measurements which are all very close to overall mean

Question 29

Resolution

Answer 29

How small the scale divisions of measurement

Question 30

Y axis

Answer 30

Dependant variable

Question 31

X axis

Answer 31

Independant variable