Practical Vocabulary Flashcards Preview

AS & AL Chemistry Vocab > Practical Vocabulary > Flashcards

Flashcards in Practical Vocabulary Deck (10):
1

independent variable

one under investigation, changed systematically and for which we can choose different values

2

dependent variable

one we mearsure to judge the effect of changing the independent variable

3

control variable

kept constant to ensure a fair test is carried out

4

range

the minimumand maximun values for the independent jor the dependent variable.

5

interval

difference chosen between consecutive values of the independent variable

6

anomalous result

a rusult that does not follow an established pattern

7

precise results

results in which each set of repeat readings are grouped closely together

8

accurate results

results that reflect the true value of a quantity

9

random error

cause results to fluctuate around a mean value. The results are made more reliable by making a number of readings and averaging them. e.g. human error

10

systematic error

affects all the measurements in the same way, giving values higher or lower than the true result. Hence cannnot be averaged out. e.g. heat loss in enthalpy change experiment