Practical skills

Question 1

Define an indépendant variable

Answer 1

The one variable that you change

Question 2

Define a dependant variable

Answer 2

The variable that you measure

Question 3

Define a control variable

Answer 3

Any variable you keep the same to make it a fair test

Question 4

Define directly proportional

Answer 4

If one variable increases the other variable increases at the same rate. eg if x doubles then y must double

Question 5

Define inversely proportional

Answer 5

If one variable increases the other variable decreases at the same rate. eg if x doubles then y must halve

Question 6

Define an anomalous result

Answer 6

An result which does fit the pattern of trend

Question 7

Define interval

Answer 7

The spacing between measurements eg 0, 10, 20, 30 40, 50 cm would have an interval of 10

Question 8

Define range

Answer 8

The maximum and minimum values eg 0, 10, 20, 30, 40, 50 would have a range of 50 - 0 cm

Question 9

Define resolution

Answer 9

The smallest change that can be measured with a particular piece of equipment

Question 10

How can the uncertainty in a measurement be measured?

Answer 10

Half of the range

Question 11

When should you draw a line graph

Answer 11

When both variables are continuous

Question 12

When should you draw a bar graph

Answer 12

If one of the variables is discrete or categoric

Question 13

Define a continuos variable

Answer 13

Can be recored as any number eg time, mass, volume

Question 14

Define a discrete variable

Answer 14

Can be recored only as a whole number eg number of goals in a match

Question 15

Define a catergoic variable

Answer 15

Is recored in words instead of numbers eg colours or types of metal