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### 46 True/False questions

1. three basic dimensionskilogram

2. method error can be greatly reduced by _________ the method of taking measurementsstandardizing

3. lightoptics

4. motion and its causes, interactions between objets7

5. specific types of repetitive motionselectromagnetism

6. those digits in a measurement that are known with certainty plus the first digit that is uncertaincertain -- uncertain

7. base unit of timekilogram

8. electricity, magnetism, and lightelectromagnetism

9. particles moving at any speed, including very high speedsmechanics

10. the description of what kind of physical quantity is represented by a certain measurement is called ________dimension

11. ______ _____ ______ estimates can also be used to estimate numbers in situations in which little information is givenorder-of-magnitude

12. zeros in front of nonzeros are ________not significant (ex. 0.892 has 3 significant figures)

13. behavior of submicroscopic particlesmechanics, thermodynamics, vibrations and wave phenomena, optics, electromagnetism, relativity, quantum mechanics

14. heat and temperaturesecond

15. measurements of physical quantities must be expressed in units that match the ________ of that quantitydimensions

16. zeros that are at the end of a number and also to the right of the decimal are _________significant (ex. 50.3 has 3 significant figures)

17. physical quantities that can be described as a combination of length, mass, and time (the three basic dimensions)method error

18. to make expressions as simple as possible, physicists often use ______ to describe specific quantities in an equationletters

19. measurements used in calculations should have the same _____not significant (ex. 0.892 has 3 significant figures)

20. how many SI base units are there?7

21. poor _______ involves errors that can often be correctedaccuracy

22. many of the models currently used in physics are ________ modelsmathematical

23. a common convention used in science to indicate precision is known as ________ _________significant figures

24. physicists use the tools of mathematics to describe measures or pre directed relationships between _______ ________ in a situationmodels

25. an experiment that tests only one factor at a time by using a comparison of a control group with an experimental groupcontrolled experiment

26. a pattern, plan, representation, or description designed to show the structure or working of an object, system, or conceptround the final answer to the first column from the left containing an estimated digit

27. significant figures rule for multiplication and divisionround the final answer to the first column from the left containing an estimated digit

28. base unit of masssecond

29. a set of particles or interacting components considered to be a distinct physical entity for the purpose of studysystem

30. significant figures rule for addition and subtractionfinal answer has the same number of significant figures as the measurement have the smallest number of significant figures

31. zeros between other nonzero digits are ________not significant (ex. 0.892 has 3 significant figures)

32. base unit of lengthmeter

33. during an experiment if some measurements are taken using one method, and some are taken using another method ______ _______ will resultmethod error

34. the description of how much of a physical quantity is represented by a certain numerical measurementdimension

35. an explanation that is based on prior scientific research or observations and that can be testedhypothesis

36. 7 major areas of physicskilogram

37. physicists often use _______ to explain the most fundamental features of various phenomenamodels

38. a numeric measure of confidence in a measurement or result is known as ________uncertainty

39. SI uses ________ to accommodate extremessecond

40. although each dimension is unique, a dimension can be measured using different ______precision

41. the degree of exactness of a measurementprecision

42. significant figures are the ones that we know for ______, as well as the first digit that is ________certain -- uncertain

43. a description of how close a measurement is to the correct or accepted value of the quantity measuredaccuracy

44. in scientific notation, the measurement is recorded to a power of 10, and all of the figures given are _________significant

45. in an experiment to test a hypothesis, you must change _____ _______ at a time to determine what influences the phenomenon you are observingone variable

46. a lack of _______ is typically due to limitations of the measuring instrument and is not the result of human error or lack of calibrationprecision