Physics key words

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Across
  1. 2. These cause readings to differ from the true value by a consistent amount each time a measurement is made.
  2. 5. The maximum and minimum values of a variable.
  3. 7. The interval within which the true value can be expected to lie. Whenever a measurement is made, there will always be some uncertainty or doubt about the result obtained. It can be expressed in terms of spread of values obtained.
  4. 9. These are values in a set of results which are judged not to be part of the variation caused by random uncertainty.
  5. 10. Data which has been shown to be valid.
  6. 11. xxxxxxxxxx that have values that are labels, example types of material.
  7. 14. the variable of which the value is measured for each and every change in the independent variable.
  8. 15. another term for uncertainty.
  9. 19. A measurement is xxxxxxxxxx if the investigation is repeated by another person, or by using different equipment or techniques, and the same results are obtained. Previously known as reliable.
  10. 21. Marking a scale on a measuring instrument. This involves establishing the relationship between indications of a measuring instrument and standard or reference quantity values, which must be applied. For example, placing a thermometer in melting ice to see whether it reads zero, in order to check if it has been calibrated correctly.
  11. 22. this is the value that would be obtained in an ideal measurement.
  12. 23. Suitability of the investigative procedure to answer the question being asked.
  13. 24. Information that has been collected.
  14. 25. These are physical, chemical or biological quantities or characteristics.
  15. 27. xxxxxxxxx that can have values (called a quantity) that can be given a magnitude either by counting (as in the case of the number of shrimp) or by measurement (eg light intensity, flow rate etc). Previously known as discrete variable.
  16. 28. These cause readings to be spread about the true value, due to results varying in an unpredictable way from one measurement to the next.
  17. 29. The quantity between readings, eg a set of 11 readings equally spaced over a distance of 1 metre would give an xxxxxxx of 10 centimetres.
Down
  1. 1. A measurement is xxxxxxxxx if the original experimenter repeats the investigation using same method and equipment and obtains the same results. Previously known as reliable.
  2. 3. A conclusion supported by valid data, obtained from an appropriate experimental design and based on sound reasoning.
  3. 4. A statement suggesting what will happen in the future, based on observation, experience or a hypothesis.
  4. 6. the variable for which values are changed or selected by the investigator.
  5. 8. The difference between a measured value and the true value.
  6. 12. A line graph, that shows the general shape of the relationship between two variables. It will not have any points plotted and although the axes should be labelled they may not be scaled.
  7. 13. Any indication that a measuring system gives a false reading when the true value of a measured quantity is zero, eg the needle on an ammeter failing to return to zero when no current flows. It may result in a systematic uncertainty.
  8. 16. A test is one in which only the independent variable has been allowed to affect the dependent variable.
  9. 17. This is the smallest change in the quantity being measured (input) of a measuring instrument that gives a perceptible change in the reading.
  10. 18. A proposal intended to explain certain facts or observations.
  11. 20. measurements are ones in which there is very little spread about the mean value.
  12. 26. A measurement result is considered accurate if it is judged to be close to the true value.
  13. 27. variable is one which may, in addition to the independent variable, affect the outcome of the investigation and therefore has to be kept constant or at least monitored.