1. 200 pt 300 pt 400 pt 500 pt 100 pt 200 pt 300 pt 400 pt 500 pt 100 pt 200pt 300 pt 400 pt 500 pt 100 pt 200 pt 300 pt 400 pt 500 pt 100 pt 200 pt 300 pt 400 pt 500 pt 100 pt Significant Figures SI Units Scientific Method Density Grab Bag

2. The number of significant figures in this measured quantity: 150.060 mm

3. 6

4. The measured value of 0.0003450 g has _____ significant figure

5. 4

6. The sum of 225.678 km and 43 km is _____ km when expressed with correct number of significant figures

7. 9700 km

8. The product of 3.5 x 10 4 ml and 1.4 x 10 -3 g/ml is

9. 49

10. Zeros are always considered significant when

11. Occur between two nonzero digits

12. Fundamental SI unit for temperature

13. Kelvin

14. Convert 25°C to the Kelvin scale

15. 298 K

16. Example of an SI base unit

17. Kilogram, meter, liter, or second

18. 130 K temperature would be what measurement on the Celsius scale

19. - 130 ° C

20. When measuring density what should always be specified

21. Temperature

22. A tentative answer is called a

23. Hypothesis

24. When experimentations occur, you are testing

25. Variables

26. State the steps to the scientific method

27. State the Question Pose an Hypothesis Design an Experiment Evaluate Results

28. Can you generate a natural law about whether wolves can see color and why?

29. No – a natural law describes how nature behaves

30. Why is it not possible for a scientist to state that a scientific theory or law is absolutely and forever correct?

31. Subject testing Can be modified or changed Observations and experimental results

32. Gold has a mass of 0.30 grams what would the volume of this piece be if pure gold has a density of 19.3 g/cm 3

33. .016 cm 3

34. What is the density of quartz is you have a 7.00 cm 3 sample of quartz that has a mass of 14 grams?

35. 0.5 g/cm 3

36. The volume of a small piece of gold (density = 19.3 g/cm 3 ) is 13.4 cm 3. What is the volume of a piece of silver (density = 10.5 g/cm 3 ) that has the same mass as the gold?

37. 24.6 g/cm 3

38. If measurements agree closely but differ widely from the actual value these measurements are considered

39. Precise but not accurate

40. Measurements are always uncertain because

41. Instruments aren’t precise and measurements involve some estimation

42. How many milliliters are equal to 3.09 liters of water

43. 3090 mL

44. If the speed of light is 300000 kilometers per second what is this number in scientific notation?

45. 3.0 x 10 5

46. Express both numbers in scientific notation –0.0000034 cm –5,600,000,000,000 g

47. 3.4 x 10 -6 5.6 x 10 10

48. Convert 460.98 g into the following units into kg and mg. Express in scientific notation

49. .46098 kg 460980 mg

50. Use the four step method to solve a problem. An object has a volume of 316 m 3, a height of 4.00 m, and a width of 8.00 m. What is the length of the object?

51. 9.9 m