1 / 74

Science Lesson Week 3

Science Lesson Week 3. Evaluate the accuracy and reproducibility of data II. Objectives: Students will be able to measure, convert their measured values to another unit using two systems of measurements. III. Materials:. Notebook Textbook Measurement –Conversion Table

hendrickson
Download Presentation

Science Lesson Week 3

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Science Lesson Week 3 Evaluate the accuracy and reproducibility of data II. Objectives: Students will be able to measure, convert their measured values to another unit using two systems of measurements.

  2. III. Materials: Notebook Textbook Measurement –Conversion Table Conversion Worksheets Experiments: Length Area Volume Mass Boxes, Cubes, Tables, Triple beam balances, meter stick

  3. Notes 2: Measurements CA standard : 9b

  4. IV. Input • Cornell Notes # 2 Measurement

  5. Measurement– is the process of comparing something with a standard ( measuring instrument) Size – refers to physical proportion, dimensions, magnitude or extent 2 Systems of Measurements : a. SI –International System of Units or Systeme International also known as the Metric System b. English System

  6. SI ( Metric System) Base Unit of a. length- meter b. mass- kilogram c. time - second d. temperature- Kelvin Celsius English System Base Unit of a. length – feet b. mass- pounds c. time – seconds d. temperature-Fahrenheit 2 Systems of Measurements

  7. Measuring Tools

  8. Measuring Tools

  9. Conversion from SI to English Systemand English System to SI LENGTH • 1 inch ( in) = 2.54 centimeter • 1 meter (m) = 3.28 feet • 1 meter (m) = 39.36 in • 1 mile (mi) = 1.6 km • 1 kilogram (kg) = 2.2 lbs

  10. Prefixes X1000 Kilo k X100 Hecto h X 10 Deka da Basic Units Meter m Gram g Liter L 1/10 Deci d 1/100 Centi c 1/1000 Milli m

  11. kilometer – km meter - m centimeter- cm millimeter - mm Common Conversions 1 km = 1000m 1 m = 100 cm 1 cm = 10 mm 1 m = 1000mm Common Conversions (SI )for Length

  12. Mass Units SI Kilograms- kg Grams – g Centigram -cg Milligrams- mg Tons English Pounds – lbs 1kg = 1000g 1g= 1000mg 1ton = 1,000 kg 1kg = 2.2 lbs (pounds) Weight Units Newtons – N Weight = Mass,kg X10 m/s2 Mass and Weight Units

  13. SI 1 cc = 1mL = 1cm3 1L = 1000mL English 1L = 0.264 gallons Conversion Factors for Volume

  14. Common SI Prefixes p 826

  15. Draw a Meter Stick Metric SI System Side English System Side

  16. kilometer – km meter - m centimeter- cm millimeter - mm Common Conversions 1 km = 1000m 1 m = 100 cm 1 cm = 10 mm 1 m = 1000mm Common Conversions (SI )for Length

  17. # Experiment 1: Measurement Meter Stick • What units are on the two sides of a meter stick? What system does it belong? a. b. 2. How long is a meter stick in meters (m) ? 3. How many feet are there in 1 meter (m) ?

  18. 4.How many centimeter is a decimeter? 1 dm =________cm 5. How many centimeter is a meter? 1 m = _______cm 6. What is the smallest division in a meter stick ? ___________ 7. How many millimeters are there in a centimeter? 1cm = _____mm 8. How many millimeters are there in a meter? 1 m = _______mm

  19. 9. 1 meter (m) = ________ft 10. Measure the width of the table in centimeter (cm). width (w) = ______ centimeters (cm) width (w) = ______meters (m) width (w) = ______inches (in) width (w) = _______feet (ft) 11. Measure the length of the table length = _______centimeters (cm) length = _______meters (m) length = _________ inches (in) length = _______feet (ft)

  20. 12. Measure the side of each cube in side = _______cm side = _______ m side = _______inch side = _______ft 13. CALCULATIONS a. b. c. d. e. f.

  21. Homework on Conversion of Units • 500 cm  m • 3.5 km  m • 2,200 mm  m • 45 m  cm  mm • What do you do the decimal point of a number if you are converting from smaller unit to a bigger unit ? Decimal point is moved to_________.

  22. Prefixes X1000 Kilo k X100 Hecto h X 10 Deka da Basic Units Meter m Gram g Liter L 1/10 Deci d 1/100 Centi c 1/1000 Milli m

  23. EXAMPLES: Conversion of Units • 104 km  m • 8 mm cm • 2500 m  km • 50 cm m • 3m  ft • 12in cm

  24. HWConversion of Units • 33.33 m =_____ cm • 66.7 m =_____mm • 48.52 km =____m • 5.51 m= _____ ft • 2.6 ft= ____ m • 3.8 cm = _____in • 3.1 km =_____mi

  25. Conversion of Units • 1. 25 mcm • 2. 150 m  km • 3. 200 cm  mm • 4. 550 mm m • 5. 50 ft m • 6. 250 in cm • 7. 46 mi  km

  26. Metric Mania

  27. VI. Closure Experiment on Length and Mass

  28. Friday: Experiment on Length Monday : Check Metric Mania Significant Figures , Experiment 2 Tuesday: Experiment : Mass Measurement Wednesday : Part 1 Quiz on Measurement Thursday : Part 2 Measurement use scantron

  29. MASS and WEIGHTCornell Notes • Mass – is the amount of matter. The number of particles in an object or liquid. It is measured in grams (g) • Weight- heaviness due to the pull of gravity. This a downward force caused by gravity. It is measured in Newtons(N) Triple Beam Balance ( Drawing )- instrument used to measure mass in grams (g)

  30. Mass Units SI Kilograms- kg Grams – g Centigram -cg Milligrams- mg Tons English Pounds – lbs 1kg = 1000g 1g= 1000mg 1ton = 1,000 kg 1kg = 2.2 lbs (pounds) Weight Units Newtons – N Weight = Mass,kg X 10 m/s2 Mass and Weight Units

  31. Mass in kg 16 gkg 303 gkg 40 kg 500 mgkg 10 gkg Weight in Newtons = mass (m) X acceleration due to gravity (g=10m/s2) W= mg 16 g kg = .016kg Weight = .016 kg X 10 m/s2 = .16Newtons or W= 0.16 N Mass and Weight

  32. Acceleration – Gravitational Acceleration (g) The change in speed and direction or velocity. The change in the object’s speed due to gravity (g) g = 9.8 m/s/s =10 m/s2 g = 32 ft/s2 Gravitational Acceleration (g)

  33. Weight Is a downward FORCE Is affected by gravity Weight = Mass, kg X gravitational acceleration (g) Weight = Mass X g ( 9.8=10m/s2) WEIGHT

  34. Experiment 2: Mass and Weight Purpose : To measure the mass of each cube using a triple beam balance and calculate each weight. 2pts Safety ________ Time ______ Cleanliness______ Report ____ Cooperation _______ Materials :3 pts 9 cubes triple beam balance experiment paper Gloves pencil

  35. Procedures: 5 pts • Calibrate the triple beam balance for accurate reading. • Measure the mass of each cube in grams . • Record in Data Table 1 • Convert each mass in grams to kilograms . • Record again in Data Table 1 • Calculate the weight using Weight = mass in Kg X 10 m/s2 • Record in Data Table 1

  36. Data Table 1 10 pts

  37. Calculationsskip 3 lines 1. 2. 3. Up to 9.

  38. Graph 10 ptsWeight VS Mass,kg • Slope = rise / run 10 pts • Slope Equation y=mx + b 10 pts • TOTAL = 30 pts

  39. Graph Weight of each Cube 5pts

  40. Analysis and Conclusion • Differentiate mass and weight in terms of definition and units. • How do you measure mass? • What are the parts of the triple beam balance and its uses? How do you use the triple beam balance? • How do you calculate weight. • Does the mass of an object remain constant in different location on earth and space ? Why ? • Does the weight of an object remain constant in different location on earth and space ? Why ?

  41. Experiment 3: Mass and Weight of WATER Purpose : To measure the mass of WATER using a triple beam balance and calculate its weight. 2pts Safety ________ Time ______ Cleanliness______ Report ____ Cooperation _______ Materials :3 pts Distilled Water Tap Water triple beam balance test tubes experiment paper graduated cylinder Gloves pencil Test tube rack

  42. Procedures: 5 pts • Calibrate the triple beam balance for accurate reading. • Measure the mass of the empty cylinder. • Pour the sample water into the graduated cylinder ,then measure the mass of the cylinder with water. • Measure the mass in grams of different samples of water, 10 mL each by subtracting the mass of the empty cylinder from the mass of the cylinder with water. • Record in Data Table 1 • Convert each mass in grams to kilograms . • Record again in Data Table 1 • Calculate the weight using Weight = mass in Kg X 10 m/s2 • Record in Data Table 1

  43. Data Table 1 10 pts

  44. Calculations Mass of water samples ,gkg and calculate weight = mass X gravity • Distilled Water skip 5 lines 2. Tap Water

  45. Calculationsskip 3 lines 1. 2. 3.

  46. Analysis and Conclusion • How did you measure the mass of water? Explain 2. Which water sample has a greater mass ? Why? 3. How did you convert mass in grams to kilograms? 4. How did you calculate weight of water ? what is the unit of weight in SI?

  47. Significant Figures • The number of significant figures in a number is the number of digits whose values are known with certainty. Rules in determining the Significant Values: • All non zero digits are significant. 12.34 - 4 significant figures • All zeros to the right side of a non zero digit but to the left of an understood decimal point are not significant. 102,000 – 3 significant figures 102,000 – 5 significant figures 3. Zeros between two non zero digits are significant. 120.003 - 6 significant figures

  48. 4. All zeros to the right of a decimal point but to the left of a non zero digit are not significant. .000123 – 3 significant figures 5. All zeros to the right of a decimal point and to the right of a non zero digit are significant. 0.01020- 4 significant figures 10.00 - 4 significant figures

  49. CW Significant Figures How many significant figures are there in the following numbers: • )104,000 6.) 22.00 • )343.5 7.) 0.007870 • )0.00056 8.) 6.50 • )34.003 9.) 809.00 • )5.630 10.) .00807

  50. Notes 4: Area and Volume • Area – is the space occupied by a flat object or 2 dimensional object Area Formulas of Regular shapes: • Square A= s x s • Rectangle A = l x w • Circle A = TT r 2 or A = TT d2 / 4 4. Triangle A = ½ bh

More Related