Scientific Method

Question 1

Hypothesis

Answer 1

A hypothesis is one idea that can be tested. It is normally written as an “if/then” statement.

Question 2

Variable

Answer 2

any factor that can change during an experiment

Question 3

Independent Variable

Answer 3

in the experiment, the factor that is being investigated; the variable that is being deliberately changed to determine its effect

Question 4

Dependant variable

Answer 4

in an experiment, the factor that changes in response to the independent variable; factor being measured

Question 5

Qualitative data

Answer 5

data that is subjective: quotes and statements etc

Question 6

Quantitative data

Answer 6

data that is measured numerically

Question 7

Conclusion

Answer 7

A conclusion is a statement that is supported or disproved by the data. It relates back to the particular hypothesis under investigation. Often a conclusion will contain a number of inferences to explain experimental results.

Question 8

Controlled Experiment

Answer 8

the experiment needs to be controlled to ensure this the experiment requires controlled variables

Question 9

Validity

Answer 9

is an experimental designs that tests what it proposes to test

Question 10

Reliability

Answer 10

means would you get the same results again and again

Question 11

Improve Reliability

Answer 11

• test, retest (as many tests as possible)

- increase sample size

Question 12

Improve validity

Answer 12

• control variables

- increase sample size