experimental design

Question 1

independent variable

Answer 1

is the variable that is deliberately changed on purpose by the experimenter

forming the ‘if; part of the statement

Question 2

Dependant variable

Answer 2

is the direct response to the independent variable. it’s value/response is due to changes to the independent variable

forms the ‘then’ part of the statement

Question 3

hypothesis

Answer 3

is a suggested solution or outcome to a specific scientific finding

if(IV) then (DV)

Question 4

control

Answer 4

the group or standard that we are comparing everything to

Question 5

controlled

Answer 5

-factors held constant
- increase the validity of the experimental design

Question 6

errors

Answer 6

factors that are unable to be held constant

Question 7

random errors

Answer 7

inconsistently and randomly and are often caused by human error.
can affect the precession of the experiment. to overcome this increase the sample size as required

Question 8

systematic errors

Answer 8

occurs consistently is often a problem with design or methodology. it can effect the accuracy of the experiment.

to overcome thins a systematic repeat is vital for the validity

Question 9

Extraneous variables

Answer 9

extraneous variables are factors that may show a false correlation between the dependent and independent variables leading to a null or invalid hypothesis and an effect on the outcome of the data

Question 10

graphs

Answer 10

the resolution refers to the level fo detail given in results. ensure all data has the same resolution

Question 11

reliability

Answer 11

Reliability refers to how consistently a method measures something.

Question 12

accuracy

Answer 12

Accuracy refers to the closeness of a measured value to a standard or known value