Expectations: 1) To learn the appropriate units for measuring mass, length and volume.

Transcription

1 page 1 of 12 Science 8 Learning Guide 02 Metric System and Measurement Expectations: 1) To learn the appropriate units for measuring mass, length and volume. 2) To learn the metric prefixes and how to do conversions from one metric prefix to another. 3) To learn to write up a formal lab report. Resources: Measurement handouts. Directions to Students: Activity #1: Metric Conversions Worksheets a) Attend the metric introduction done in class with your Science 8 teacher. b) Then complete Metric Conversions Work Sheet page # 1 and 2 (# 1 to 42). When the metric worksheets are completed use the answer key to mark them. Note: Metric Conversions Work Sheet page # 3 is for Extra Practice. c) Complete Metric Conversions Work Sheet page # 4 Volume of a Box or Cube. Activity #2: Measurement (refer to pages 5 and 6) a) Complete Measurement Work Sheet page # 5 Reading Scales. b) Complete Measurement Work Sheet page # 6 Reading Scales. c) Do Measurement Super Lab # 1. d) Do Measurement Super Lab # 2. Activity #3: Study for the metric quiz by reviewing your measurement and metric worksheets. Write the measurement and metric quiz.

2 page 2 of 12 Science 8: Metric Conversions Units of measurement: Quantity Unit Abbreviation Instrument Length metre m ruler Mass gram g balance Volume litre L graduated cylinder Temperatur e degree Celsius or Kelvin C thermometer K Time seconds s stopwatch Number line illustration: Exponent Symbol **works only from kilo to milli.** k h da m,l,g d c m Number base Prefix kilo hecto deca 1 deci centi milli metres, Liters, grams each step left remove one zero (place) each step right add one zero (place) Examples: 1)convert 1 kilogram to? grams Solution: start at kilo with "1" move right to hecto, add one zero =10 move right to deca, add one zero =100 move right to grams, add one zero =1000 grams (g) 2)convert 0.03 metres to? millimetres Solution: start at metre with ".03"move right to deci, add one place = 0.3 move right to centi, add one place =3 move right to milli, add one place = 30 millimetres(mm) 3) convert 3000 centimetres to? decametres Solution: start at centi with "3000"move left to deci, drop one place = 300 move left to metres, drop one place = 30 move left to deca, drop one place = 3 decametres(dam)

3 page 3 of 12 Metric Conversions Work Sheet page # 1 Convert the following: Please use a pencil. A) Linear measure (length) m = cm mm = dam cm = mm mm = cm 3. 2 km = m hm = mm cm = hm cm = km km = cm dam = cm m = km cm = mm mm = km km = cm m = cm m = mm km = m km = mm 10. 3/4 m = cm dam = km km = m cg = mg mm = cm mm = hm B) Mass dag = cg dg = g hg = cg g = kg mg = dg cg = kg g = cg g = mg C) Volume dl = ml L = ml cl = ml kl = cl ml= L hl = dl

4 page 4 of 12 Metric Conversions Work Sheet page # Carl Lewis ran cm. Miriam Bedard skied 1km. Who traveled farther? By how much? Show all work. 40. A mosquito sucks.1ml out of a human. A bat sucks.1 dl out of a cow. How much more blood does the bat drink? Show all work. 41.An elevator can hold a maximum of 800 kg. There are 10 people in the elevator, each weighing g. Why does the elevator not plummet to the earth killing everyone? Show all work. 42. Joe Colorado lives by the ocean in a land called Honalee. He has a pool that holds 370 hl of water. The pool now contains 2 kl of water and a tsunami comes and dumps water into the pool filling it to the top. How much water did the tsunami dump into the pool? Show all work.

5 page 5 of 12 Metric Conversions Work Sheet page # 3 Extra Practice m = mm L = cl m = cm L = ml cm = m cl = L mm = cm cl = ml m = mm ml = L cm = m dl = L 7. 5 kg = mg hg = kg g = kg dam = cm cg = mg hm = dm kg = mg cl = kl mg = kg kg = dag ml = L

6 page 6 of 12 Metric Conversions Work Sheet page # 4 Science 8: Volume of a Box or Cube Volume of Cube: The volume of solid object with regular shapes such as boxes or cubes can be measured using a ruler. Volume = Lenght x Width x Height The units for the volume of a cube would be in cubic units. If the the length, width, and height are in cm, then the volume would be in cm3. example:

7 page 7 of 12

8 page 8 of 12 Measurement Work Sheet page # 5 Science 8: Reading Scales

9 page 9 of 12 Measurement Work Sheet page # 6 Science 8: Reading Scales How to read the scale on a Centigram Balance: Step #1: Read the 100's g arm of the Centigram Balance. eg. #1 = 100 geg. #2 = 0 g Step #2: Read the 10's g arm of the Centigram Balance. eg. #1 = 20 geg. #2 = 50 g Step #3: Read the 1's g arm of the Centigram Balance. eg. #1 = 2 geg. #2 = 9 g Step #4: Read the 0.10's g arm of the Centigram Balance. First read the numbered division to the left of the pointer. eg. #1 = 0.5 geg. #2 = 0.2 g Step #5: Next count the unnumbered division to the left between the numbered division and the pointer. eg. #1 = 6 unnumbered divisionseg. #2 = 4 unnumbered divisions = 0.06 g= 0.04 g Step #6: Estimate the distance between the unnumbered divisions to the left and right of the pointer. eg. #1 = pointer exactly on unnumbered division = g eg. #2 = pointer exactly on unnumbered division = g Note: If the pointer was half way between the unnumbered division then we would have g. If the pointer was a quarter the way between the unnumbered division then we would have g which would be rounded to g. Finally: Put all the numbers together. eg. #1 = 100 g + 20 g +2 g +0.5 g g g = g eg. #2 = 0 g + 50 g +9 g +0.2 g g g = g

10 page 10 of 12 Science 8 Super Measurement Lab # 1 Name 1: Name 2: Date: Block: Definition: Getting exact information about an object for a specific characteristic such as its height, weight, length, size, volume, or temperature. Measure the following objects in the classroom and record the measurement in the space provided below. Your mass The length of your a) foot Your height b) shoe The width of the classroom where the cabinets are The height of the bench The width of the teacher's bench The distance between these two lines >I I< The mass of a piece of a) chalk b) penny c) loonie The volume of the dictionary The mass of a chalk eraser The temperature of Beaker A Beaker B The volume of liquid in a) cup b) plastic cylinder c) shoe box d) AA battery e) small box QUESTIONS What is the unit for measuring the mass of a large object? What is the unit for measuring the mass of a small object? What is the unit for measuring volume of a solid? What is the unit for measuring volume of a liquid? What is the best unit for measuring the height of a large object? What is the best unit for measuring the length of a small object: What is the unit for measuring temperature?

11 page 11 of 12 Science 8 Super Measurement Lab #2 Name 1: Name 2: Date: Remember, each measurement has a NUMBER and a UNIT! 1 Notebook and Agenda Check /2 a) Notebook Organized b) Agenda Book Homework club invitation? ASVP Y / N 2 Volume of box A Volume of box B /2 /2 Block: 5 Mass of one penny: /2 Mass of one nail: /2 Mass of one rubber stopper: /2 Mass of one AA battery: /2 Instrument used: /1 6 Temperature of Liquid A: /2 Temperature of Liquid B: /2 Instrument used: /1 3 Volume of the BLUE liquid: /2 Volume of the YELLOW liquid: /2 Volume of the CLEAR liquid: /2 Instrument used: /1 Instrument used: /1 7 Indirect mass of solids Mass of sample A: Final Mass empty perti dish + sample A: - Initial Mass empty perti dish: Mass of sample A: /2 Mass of sample B: Final Mass empty perti dish + sample B: - Initial Mass empty perti dish: Mass of sample B: /2 Instrument used: /1

12 4 Indirect volume of rocks Black rock: Final Volume - Initial Volume Volume of black rock: /2 White rock: Final Volume - Initial Volume Volume of white rock: /2 Instrument used: /1 page 12 of 12 8 Indirect mass of liquids 30 ml of water: Final Mass Dry beaker + 30 ml water - Initial Mass of dry beaker Mass of 30 ml water: /2 10 ml of water: Final Mass Dry beaker + 10 ml water - Initial Mass of dry beaker Mass of 10 ml water: /2 Instrument used: /1