General Practical and Maths Skills e.g Key Terms

Question 1

Repeatable meaning

Answer 1

If the same person repeats the experiment using the same methods and equipment then they will get the same results

Question 2

Reproducible meaning

Answer 2

If the investigation is repeated by a different person or using different equipment/ techniques (method) the same results would be obtained

Question 3

Repeatable vs reproducible

Answer 3

Repeatable is where if the same person carried out the experiment using the same method and equipment then they will get the same results

Reproducible is if a different person carried out the experiment/ different equipment and techniques were used then they the same results would still be obtained

Question 4

Key term for where if the same person carried out the same experiment using the same equipment and method then they will get the same results

Answer 4

Repeatable

Question 5

Key term for where if the experiment was carried out by a different person/ using different equipment or techniques then the same results would be obtained

Answer 5

Reproducible

Question 6

A result is considered accurate if it’s close to the …

Answer 6

True value

Question 7

Results are considered … if they’re close to the true value

Answer 7

Accurate

Question 8

Precise results are ones that are close to the…

Answer 8

Mean value

Question 9

To get…results you need to use control variables

Answer 9

Valid
(This makes sure you are answering the original question)

Question 10

You should always measure volume from the…of the miniscus

Answer 10

Bottom

Question 11

Standard deviation meaning

Answer 11

A measure of how spread out a set of data is around the mean value

Question 12

Key term for a measure of how spread out a set of data is around the mean value

Answer 12

Standard deviation

Question 13

True or false, your hypothesis is your theory

Answer 13

False
Hypothesis is the prediction based on your theory (it’s more specific)

(E.g if the theory is that light intensity affects rate of photosynthesis, the hypothesis (prediction) could be that as light intensity increases, rate of photosynthesis increases)

Question 14

Key term for prediction based off a theory

Answer 14

Hypothesis
(E.g as light intensity increases, so does rate of photosynthesis)

Question 15

When drawing a results table, the…variable should be in the left hand column and the…variable should be in the right hand column (but may be split into multiple columns e.g 3 columns for repeat 1, repeat 2, repeat 3)

Answer 15

Independent= left
Dependent= right

Question 16

Where in a table do you include units

Answer 16

Just in the column heading (use a slash not brackets)

Question 17

A… (bigger/ smaller) standard deviation means that the results are closer to the mean so are more precise

Answer 17

Smaller

Question 18

Null hypothesis meaning

Answer 18

A hypothesis (prediction) that states there is no correlation between the things you’re investigating

(This is used when carrying out statistical tests so that you can use the statistical test to try and disprove the null hypothesis)

Question 19

One advantage of using pH meter over pH indicator during experiment

Answer 19

Not subjective