Keywords Flashcards Preview

Science > Keywords > Flashcards

Flashcards in Keywords Deck (31):
1

Data

Measurements or information you collect during your investigation

2

Mean

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

3

Range

Highest and lowest vales

4

Intervals

Gap between the readings

5

Independant variables

Thing that you deliberately change

6

Dependant variables

The thing that you measure

7

Control varibale

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

8

Fair test

Only the independant variable changes

9

Categoric variables

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

10

Continuous variables

Have any numeric value, plotted on a line graph

11

Hypothesis

Suggestion to explain facts or observations

12

Prediction

Suggestion of what will happen based on an observation or hypothesis

13

Repeatable

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

14

Reproducible

Same results obtained by somebody else or using a different technique

15

Bias

Someone's opinion is due to favouritism or hidden interest

16

Valid

Only if a fair test and no bias

17

Evidence

Data which is considered valid

18

Secondary evidence

Data collected from somebody else

19

True value

Correct value to be found without errors

20

Uncertainty

Range which the true value is expected to be

21

Random error

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

22

Systematic error

Results are consistently higher or lower than true value

23

Zero error

Caused by instruments that have a false zero

24

Measurement error

Difference between a measured value and true value

25

Anomalies

Results that are strange and not just random errors

26

Calibration

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

27

Accuracy

Measurement close to the true value

28

Presicion

Measurements which are all very close to overall mean

29

Resolution

How small the scale divisions of measurement

30

Y axis

Dependant variable

31

X axis

Independant variable