Year 9 Practical vocabulary

independent variable

• the variable that you change
• the variable which you keep the same
• smallest value an instrument canm measure e.g. ruler 1 mm
• Someone else repeats the experimen and gets the same result

dependent variable

• the variable which you keep the same

• the variable that you measure as it changes

• Groups of variables which can be any number, e.g. length, time

• Groups of variables which have names, e.g. colours, fruit

control variable

• the variable which you keep the same
• the variable that you change
• Groups of variables which can be any number, e.g. length, time
• Groups of variables which have names, e.g. colours, fruit

categoric variable

• Groups of variables which have names, e.g. colours, fruit
• Groups of variables which can be any number, e.g. length, time
• the variable that you change
• the variable which you keep the same

continuous variable

• Groups of variables which can be any number, e.g. length, time
• If you repeat the experiment and get the same result
• adding all the repeated results and dividing by the number of results
• the variable that you change

mean or average

• adding all the repeated results and dividing by the number of results
• the variable which you keep the same
• The difference between the maximum and the minimum value
• Gives the difference between each reading

range

• The difference between the maximum and the minimum value
• Gives the difference between each reading
• adding all the repeated results and dividing by the number of results
• the variable which you keep the same

interval

• Gives the difference between each reading
• adding all the repeated results and dividing by the number of results
• The difference between the maximum and the minimum value
• the variable that you change

line graph

• A graph which is used if the variables are continuous
• A graph which is used if the variables are categoric
• Groups of variables which can be any number, e.g. length, time
• the variable that you change

bar chart

• A graph which is used if the variables are categoric
• A graph which is used if the variables are continuous
• Gives the difference between each reading
• Groups of variables which can be any number, e.g. length, time