1. Flashcards for Unit 1

2. Anything that has mass & occupies space. Matter

3. How many fundamental units in the SI system? 7

4. Physical quantity that must be measured. It cannot be calculated. Fundamental or Base Unit

5. A unit defined as a combination of fundamental units. Derived Unit

6. Kilogram Unit of mass Fundamental Unit

7. Second Unit of time Fundamental Unit

8. Meter Unit of length Fundamental Unit

9. Kelvin Unit of temperature Fundamental Unit

10. Volume Space or Capacity Derived Unit

11. Liter Metric Unit of Volume: 10 cm X 10 cm 10 cm Derived Unit

12. ? cm 3 = 1 Liter 1000 cm 3 = 1 Liter Derived Unit

13. ? milliliter = 1 Liter 1000 mL = 1 Liter Derived Unit

14. ? milliliter = 1 cm 3 1 mL = 1 cm 3 Derived Unit

15. What is the mass of 1 liter of pure H 2 O? 1 kilogram Mass/Volume relationship

16. What is the mass of 1 cm 3 of pure H 2 O? 1 gram Mass/Volume relationship

17. Freezing Point of water in the Kelvin scale. 273 K Physical Constant

18. Boiling Point of water in the Kelvin scale. 373 K Physical Constant

19. Freezing Point of water in the centigrade scale. 0 C0 C0 C0 C Physical Constant

20. Boiling Point of water in the centigrade scale. 100  C Physical Constant

21. Ice / water equilibrium Another name for freezing point.

22. Steam / water equilibrium Another name for boiling point.

23. ? cm in 1 meter 100 cm = 1 meter Conversion Fact

24. ? mm in 1 meter 1000 mm = 1 meter Conversion Fact

25. ? m in 1 km 1000 m = 1 kilometer Conversion Fact

26. Density Mass / Volume

27. Density Describes how matter is packed into space.

28. Units of Density grams / cm 3 for solids grams / ml for liquids

29. Density D M V

30. Accuracy How close a measured value is to an accepted value.

31. Precision How close a series of measurements are to one another.

32. High Precision Low Scatter

33. Percent Error  Measured value – Accepted value  x 100% Table T, reference tables Accepted value

34.  C to K Table T, reference tables K =  C + 273

35. Scientific Notation The number is written as a product of 2 numbers: - a number between 1 & 10 - a power of 10

36. 2 X 10 -3 Negative exponent so the number is between 0 and 1: 0.002

37. 5 X 10 2 Positive exponent so the number is greater than 1: 500

38. Significant Figures All known digits plus 1 estimated digit.

39. 5400.145 cm Decimal Present – Pacific side Start counting at 1 st nonzero # 7 sig figs

40. 0.0175 g Decimal Present – Pacific side Start counting at 1 st nonzero # 3 sig figs

41. 4855 g Decimal Absent – Atlantic side Start counting at 1 st nonzero # 4 sig figs

42. 4000 mm Decimal Absent – Atlantic side Start counting at 1 st nonzero # 1 sig fig

43. Significant Figures: Rule for Addition and Subtraction Answer has same number of decimal places as the addend with the least number of decimal places.

44. 28.0 cm 23.538 cm 25.68 cm + 77.218 cm But what do you report? 77.2 cm is correct!

45. Significant Figures: Rule for Multiplication & Division Answer has same number of significant figures as the factor with the least number of significant figures.

46. 24 m X 3.26 m = 78.24 m 2 But what do you report? 78 m 2 is correct!

47. An aluminum cube has a mass of 4.75 grams. The dimensions of the cube are 1.2 cm X 1.2 cm X 1.2 cm. What is the density of the cube? a) 2.749 g/cm 3 b) 2.75 g/cm 3 “Volume” = 1.728 cm 3 c) 2.7 g/cm 3 d) 0.36 cm 3 /g 3 sig figs 2 sf

48. A solution contains 43.875 grams of NaCl dissolved in 1. Liter of H 2 O. What is the molarity expressed to the correct sig figs? 58.5 grams of NaCl = 1 mole. Calculated from P.T. 43.875 g 1 mole = 0.75 moles 58.5 grams 58.5 grams 0.75 moles/1. Liter = 0.75 M  0.8 M 5 sig figs 1 sig fig

49. Data Table 2 columns plus title independent variable – controlled by scientist (column 1) dependent variable – measured variable (column 2)

50. Graph 2 axes plus title independent variable – controlled by scientist (column 1) – GOES on X-AXIS dependent variable – measured variable (column 2) – GOES on Y-AXIS

51. Linear Relationship X-axis Y-axis Y = mX + b

52. Direct Relationship X-axis Y-axis Y = mX

53. Inverse Relationship X-axis Y-axis XY = k