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List the 4 steps of the Scientific Method in order.

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Presentation on theme: "List the 4 steps of the Scientific Method in order."— Presentation transcript:

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2 List the 4 steps of the Scientific Method in order

3 Scientific Method 1) Observation – something perceived that causes curiosity 2) Hypothesis – an educated guess 3) Experiment – Physical procedure used to test an idea 4) Theory/Law – witnessed over and over always same results

4 Complete the Scientific Method Below – Observation: You flip the light switch and nothing happens – Hypothesis: – Experiment: Independent Variable Dependent Variable Control Variables – Data Collected: Qualitative/Quantitative or Both - Explain

5 Label each dart board as accurate, precise, neither or both.

6 Label each dart board as accurate – hit target precise – same spot over and over NeitherPreciseBoth

7 Draw a dart board and indicate accurate only Label each dart board as accurate – hit target precise – same spot over and over

8 Draw a dart board and indicate accurate only Label each dart board as accurate – hit target precise – same spot over and over X ONLY 1 SHOT CANT BE PRECISE

9 ScientificOrdinary 1.36 X 10 4.00045 2.59 X 10 -5 2897.3 Scientific Notation

10 ScientificOrdinary 1.36 X 10 4 13600 4.5 X 10 -4.00045 2.59 X 10 -5 0.0000259 2.8973 X 10 3 2897.3 Scientific Notation

11 Dimensional Analysis 1.Put your given over _________ 2.What do you do with units you do not want? 3.When do you stop?

12 Dimensional Analysis 1.Put your given over _____1____ 2.What do you do with units you do not want? Put them where they cross out 3.When do you stop? When left with only the units of final answer

13 Dimensional Analysis 1.Convert 1.2 km to cm.

14 Dimensional Analysis 1.Convert 1.2 km to cm. 1.2 km X 1 X 10 5 cm = 1 1 km 1.2 km = Given 1 goes to bigger unit 5 from the number of places moved

15 Dimensional Analysis Base (m, s, l, g) = 10 0 3 to -2 is a change of 5. That is the exponent. (ALWAYS POSITIVE)

16 POGIL Do problems 1-6, 15, 17-20 Everyone in group does it. 1 collected = group grade.

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18 Convert 1)Convert 3.7 m to cm. 2)14 feet to inches 3)9.7 X 10 12 kb to Tb

19 Convert 1)Convert 3.7 m to cm. A.370 cm 3.7 m X 1 X 10 2 cm = 1 1 m

20 Convert 1)14 feet to inches A.168 inches 14 ft X 12 inches= 1 1 ft

21 Convert 1)9.7 X 10 12 kb to Tb A.9.7 X 10 11 Tb 9.7 X 10 12 kb X 1 Tb = 1 1 X 10 11 kb

22 4 Significant Figures Rules 1.Non-zero numbers are always significant 2.Zeros between non-zero numbers (or sig figs) are significant 3.All final zeros to the right of the decimal are significant 4.Placeholders zeros are not significant (convert to scientific notation to verify)

23 How many sig figs in each number 280 40030 0.002849 28.02

24 How many sig figs in each number 280  2 40030  4 0.002849  4 28.02  4

25 Round the following numbers to 3 sig figs A. 2.4569 B. 0.0004359 C. 34650

26 Round the following numbers to 3 sig figs A. 2.4569 2.46 B. 0.0004359 0.000436 or 4.36 X 10 -4 C. 34650 34700 or 3.47 X 10 4

27 Please get in your groups for a contest. Each member will need something to write on and a calculator.

28 Convert 1)Convert 3.48 km to cm Express answer to 2 sig figs and in scientific notation.

29 Convert 1)Convert 1.24 X 10 11 mL to kL Express answer to 2 sig figs and in scientific notation.

30 Convert 1)Convert 3.25 X 10 9 bytes to Gb Express answer to 2 sig figs and in scientific notation.

31 Convert 1)Convert 45 miles per hour to inches per second. (5280 ft=1 mile) Express answer to 2 sig figs and in scientific notation.

32 Convert 1)You have a 16 Gb flash drive how many 0.8 Mb files can you store? Express answer to 2 sig figs

33

34 Vector Addition The vector below represents 30 m/s East 1)Draw a vector that represents 20 m/s South

35 Vector Addition The vector below represents 30 m/s East 1)Draw a vector that represents 20 m/s South 1 block = 5 m/s  20m/s = 4 blocks

36 Vector Addition 2) Draw the resultant of the blue vector and the red vector. Is it more vertical or horizontal? Explain

37 Vector Addition 2) Draw the resultant of the blue vector and the red vector. Is it more vertical or horizontal? Explain The horizontal component is larger (more blocks)

38 Vector Addition 3) Find the magnitude of the resultant.

39 Vector Addition 3) Find the magnitude of the resultant.

40 Vector Addition 4) Draw the horizontal and vertical components of the resultant vector below

41 Vector Addition 4) Draw the horizontal and vertical components of the resultant vector below

42 Vector Addition 5) What is the total x- displacement?

43 Vector Addition 5) What is the total x- displacement? 8 blocks

44 Vector Addition 6) What is the total y- displacement?

45 Vector Addition 6) What is the total y- displacement? 3 blocks

46 Vector Addition 7) Draw the resultant of the vectors below.

47 Vector Addition 7)Draw the resultant of the vectors below. It does not matter if you draw the blue vector first or the red vector first. You end up with the same resultant vector.

48 Vector Addition 8) What is the magnitude of the resultant vector?

49 Vector Addition 8) What is the magnitude of the resultant vector? 3 blocks 8 blocks

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51 Calculate the time needed to travel 428 meters with an average velocity of 12.6 m/s.

52 Calculate the time needed to travel 428 meters with an average velocity of 12.6 m/s. v avg = ΔX Δt 12.6 = 428 Δt 12.6 * Δt = 428 Δt = 428/12.6 = 33.96 =34 s Unknown in denominator multiply both sides by it to get it in numerator Divide both sides by 12.6 Units left out for clarity

53 Given an initial velocity upward of 5 m/s for an object in freefall and the time of 3 s in freefall what equation(s) could find the height of the fall?

54 Equation 2 or 3 (v i is up and g is down so need opposite signs)

55 Vector Addition The vector below represents 30 m/s East 1) Draw a vector that represents 10 m/s West

56 Vector Addition The vector below represents 30 m/s East 1) Draw a vector that represents 10 m/s West

57 Vector Addition 2) Draw the resultant of the blue vector and the red vector. Is it more vertical or horizontal? Explain

58 Vector Addition 2) Draw the resultant of the blue vector and the red vector. Is it more vertical or horizontal? Explain Same three up and three over

59 You walk 2 meters east, 3 meters south and then 4 meters east. Draw your path as a system of vectors and then show the resultant vector with magnitude and direction.

60 You walk 2 meters east, 3 meters south and then 4 meters east. Draw your path as a system of vectors and then show the resultant vector with magnitude and direction. Step 1: Pick a scale – 1 inch = 1 meters Step 2: Start with a vector and use the tip to tale method Step 3: Draw the resultant vector starting where your first vector started and ending where you 3 rd vector ended Step 4: Find magnitude of your displacement using your scale or Pythagorean theorem The resultant vector can be broken down into its horizontal and vertical components. The horizontal component is 6 meters and the vertical component is 3 meters. The magnitude is found using the Pythagorean theorem as seen below: c = Square root ( 6 2 + 3 2 ) = square root (45) = 6.71 meters South of East

61 From the previous problem explain why the order the vectors is added does not matter.

62

63

64 Dimensional Analysis Use DA to complete the problem below: –How many 250 kB songs can fit on a 4GB flashdrive?

65 Dimensional Analysis Use DA to complete the problem below: –How many 250 kB songs can fit on a 4GB flashdrive?

66 You do an experiment in which you read more to see if it will change your SAT score. Label the axis of the graph below with the correct units. No numbers.

67 Time spent reading Independent (I change) SAT Score Dependent (Depends on how much I read)

68 Dimensional Analysis Use DA to complete the problem below: –Convert 23 miles per gallon to km’s per liter. (A 5 km race is 3.1 miles and 1 gallon is 3.78 L)

69 Dimensional Analysis Use DA to complete the problem below: –Convert 23 miles per gallon to km’s per liter. (A 5 km race is 3.1 miles and 1 gallon is 3.78 L)

70 Indicate a strong negative relationship on the graph below. Label axis with units that could be correct.

71 Time spent in Physics lab Independent (I change) # of Friends Dependent

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73 ScientificOrdinary 8.64 X 10 4.000253 6.59 X 10 -5 3597.3 Scientific Notation Answer in 2 Sig Figs

74 ScientificOrdinary 8.64 X 10 4 86000 2.5X10 -4.000253 6.59 X 10 -5 0.000066 3.6X10 3 3597.3 Scientific Notation Answer in 2 Sig Figs

75 Complete the Scientific Method Below –Observation: SAT score too low for college you want to get into –Hypothesis: –Experiment: Independent Variable Dependent Variable Control Variables –Data Collected: Qualitative/Quantitative or Both - Explain

76 Complete the Scientific Method Below –Observation: SAT score too low for college you want to get into –Hypothesis: –Experiment: Independent Variable Dependent Variable Control Variables –Data Collected: Qualitative/Quantitative or Both - Explain

77 Dimensional Analysis Use DA to complete the problem below: –Section of fence = 8 feet. You need to fence in a perimeter of 1.21 miles –How many sections of fence do you need?

78 Dimensional Analysis Use DA to complete the problem below: –Section of fence = 8 feet. You need to fence in a perimeter of 1.21 miles –How many sections of fence do you need?

79 Going forActualA, P, B, N 2.152.12, 6.14, 9.15 1.21.2, 1.3, 1.1 10099 23.536.5, 37.4, 37.0 Accuracy/Precision/Both/Neither

80 Going forActualA, P, B, N 2.152.12, 6.14, 9.15 N 1.21.2, 1.3, 1.1 B 10099 A 23.536.5, 37.4, 37.0 P Accuracy/Precision/Both/Neither

81 Dimensional Analysis Use DA to complete the problem below: –Convert 2.7X103 millimeters to kilometers (m = 10 -3, k = 10 3 )

82 Dimensional Analysis Use DA to complete the problem below: –Convert 2.7X103 millimeters to kilometers (m = 10 -3, k = 10 3 )

83 Make a graph of speed of car and horsepower of engine. Label axis – no numbers. Positive or negative. Strong/Weak (Based on your data points)

84 Make a graph of speed of car and horsepower of engine. Label axis – no numbers. Positive or negative. Strong/Weak (Based on your data points) Horsepower (I change) Speed (Depends on engine)

85 Dimensional Analysis Usain Bolt won 100 meter gold in 9.63 seconds. –Calculate speed in miles per hour (base = 10 0, k=10 3, 5km=3.1 miles)

86 Dimensional Analysis Usain Bolt won 100 meter gold in 9.63 seconds. –Calculate speed in miles per hour (base = 10 0, k=10 3, 5km=3.1 miles)

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