Science revision Flashcards
(8 cards)
What is an independent?
It is the variable that is changed in an investigation, to see what effect it has on the dependent variable.
What is a dependent variable?
It is a variable that is measured to observe any changes in response to differences, in the independent variable in an investigation.
What is a controlled variable?
Variables that are not the IV or DV, so should be held constant.
What is validity
It is whether a method actually measures what you’re looking for, and whether other variables might be significantly impacting results.
Validity is high if what?
o The DV is appropriately measured.
o All variables are controlled, both in the method and when carrying out the experiment.
o The experiment is repeated multiple times (i.e. a large sample size).
o There is a control group (i.e. a subject with a ‘zero’ value of the IV).
o There are no significant errors or mistakes.
What is Systematic errors?
A cause results to be wrong by the same amount each time.
