Lab Skills Revision

2. A statement based on experimental measurements and observations summarising the results.
3. An action involving a hazard that might result in danger.
5. Physical, chemical or biological quantities or characteristics that can change.
7. A potential source of harm
10. A set of measurements with very little spread about the mean value.
12. A collection of numerical data that describes a property of an experiment.
13. The equipment or things needed to carry out an experiment.
16. A variable that has values that fall into a limited number of groups with no overlaps.
17. A substance that catches fire easily
19. The variable of which values are changed by the investigator.
22. A substance that may cause burns to skin and damage to eyes. It may corrode metals.
23. A substance that may cause death.
24. A variable that can have values that can be given a magnitude (size) either by counting or measuring.

1. An error that causes readings to be spread about the true value, due to results varying in an unpredictable way.
4. An error that causes readings to differ from the true value by a consistent amount each time.
6. A proposal intended to explain certain facts or observations.
8. A result that does not fit the pattern.
9. A measurement or description of objective changes or behaviours.
11. The smallest scale division on a measuring instrument.
14. A measurement judged to be close to the true value.
15. The variable of which the value is measured for each and every change of the independent variable.
18. To consider the validity of a set of data.
20. A statement suggesting what will happen in the future, based on observation, experience or a hypothesis.
21. A variable that could affect the outcome of the investigation and has to be kept constant.