Investigation Skils

Question 1

Hypothesis

Answer 1

A proposal intended to explain certain facts or observations

Question 2

Dependent variable

Answer 2

A variable that is measured as the outcome of an experiment

Question 3

Independent variable

Answer 3

A variable selected by the investigator and whose values are changed during the investigation.

Question 4

Control variable

Answer 4

A variable that is kept constant during an experiment.

Question 5

Range

Answer 5

The quantity between readings, e.g. A set of 11 readings equally spaced over a distance of 1 metre would give an internal of 10 centimetres.

Question 6

Interval

Answer 6

The maximum and minimum values of the independent or dependent variable.

Question 7

True value

Answer 7

The value that would be obtained in an ideal measurement where there were no errors of any kind.

Question 8

Accurate

Answer 8

A measurement that is close to the true value

Question 9

Precise

Answer 9

Repeated measurements that are very similar to the calculated to the calculated mean value.

Question 10

Random error

Answer 10

Causes readings to be spread about the true value, due to results varying in an unpredictable way from one measurement to the next.

Question 11

Systematic error

Answer 11

Causes readings to differ from the true value by a consistent amount each time a measurement is made.

Question 12

Zero error

Answer 12

When there is an indication that a measuring system gives a false reading when the true value of a measured quantity is zero.