How Science Works

Question 1

Independent variable

Answer 1

The thing you change in an investigation

Question 2

Dependent variable

Answer 2

The thing you measure in an investigation

Question 3

Control variable

Answer 3

The thing you need to keep constant in order to make it a fair test

Question 4

How do you test the reliability of a result?

Answer 4

1.By repeating an experiment. If the repeats give the same or similar results it suggests that they are reliable

Question 5

1. How do you calculate the mean?

2. Why do we calculate the mean?

Answer 5

1. Add all of the results (excluding anomalie) and divide by the amount of results there are.
2. You increase the reliability of the mean by doing more repeats and calculating a new mean.

Question 6

which measurments are more precise g or mg?

Answer 6

mg. Because the units are smaller.

Question 7

How do we set out tables?

Answer 7

Independent variable in the first column, dependent variable in the second column and units in the headings only.

Question 8

How do we set out bar charts?

Answer 8

Independent variable is categoric (x axis) title for the graph.

Question 9

How do we set out line graphs?

Answer 9

Independent variable is continuous (x axis) and both axes labelled suitably including units. Title for the graph.

Question 10

Discrete Variable

Answer 10

Things that you count and must be whole numbers (eg. Number or people)

Question 11

Continuous variable

Answer 11

Things you measure (eg. Mass, length, time) and do not have to be whole numbers

Question 12

Categoric variable

Answer 12

A special type of discreet variable. Are described by labels (eg. dog, cat mouse)

Question 13

Anomalous result

Answer 13

A result that is very different from other repeats and any anomolous result should not be included ehen calculating the mean.