4SI Measurements (also known as “metric system”) “SI” stands for “System International” or “International System of Measurement”
5SI Measurements (also known as “metric system”) What about it?Common Language for scientistsBased on units of 10Multiply or divide to go up or down when converting unitsPrefixes determine “how much” of a unit
7SI Measurements (also known as “metric system”) Important BASE units to remember:METERS = m (measures distance or length)Measure with ruler/meterstick
8LITERS = L (measures volume — how much space something takes up) Measure with graduated cylinder/beakerOr with a ruler (length x height x width)
9GRAMS = g (measures mass) Measure with triple beam balance/scale
10oCELSIUS = oC (measures temperature) Measure with thermometer
11BASE UNIT (liter, meter, gram) Important PREFIXES to remember:k = kilo- (means “1000”)h = hecto-(means “100”)D = deca-(means “10”)BASE UNIT (liter, meter, gram)d = deci-(means “1/10” or 0.1)c = centi- (means “1/100” or .01)m = milli- (means “1/1000” or .001)
12Kids Have Dreams But Cost Money Easy way to remember the order of prefixes:KidsHaveDreamsButCostMoneyMeasurement by Brainpop
13Practice 1 meter (think meter stick) Equals 100 cm Equals 1000mm Challenge: How many kilometers?1 meter Equals 1/1000 km
14Triple Beam Balance Go to my SWIFT page. Click on Links Click on Triple Beam Balance Practice
15Evidence contd.With your table partner, complete the bottom questions 1-10.Reminder: remember Participation. Everyone should be contributing.
16Evidence 2: Measurement Lab There are 8 stations. Read the instructions and record your answers in your journals. MAKE SURE TO WRITE DOWN THE NUMBER OF THE STATION
17Measuring Liquids How many ml of water is shown in the picture? Always measure from the bottom of the meniscus.Answer: 6.6 ml
18Measuring VOLUME by displacement Used to measure irregular or non-box shapes.When you can’t measure length x height x width5.6 – 4.8 = 0.8 ml
19Measuring MassWhat is the mass? Don’t forget to include units!!!
20Station #9Use your hand measurement from the Going the Distance lesson.Convert from centimeters to:Decimeters, meters, decameters, kilometers
21Analysis QuestionsName 2 different base units that could measure the amount of water a fish tank could hold.Why is the number 10 important in the metric system?Why would the prefix “kilo” be more useful than “tera” (1 trillion)?
23Reflection: Come up with your own Metric Mnemonic: i.e. Kids Have Dreams But Dreams Cost MoneyKilo Hecto- Deca (BASE) Deci Centi Milli-ORKing Henry Doesn’t Usually Drink Chocolate MilkKilo Hecto- Deca (unit) Deci Centi Milli-
24Big Idea What is the big Idea of metric units & conversion? Metric prefixes are multiples of 10 and can be easily converted by moving the decimal.
26Get the sheet by the door and glue it into your lab notebook Get the sheet by the door and glue it into your lab notebook. Fill in the “guess” column Today: Metric Olympics!!! Goal: To test your ability to take accurate metric measurements for length, volume and mass.
27Metric Olympics You will work with a partner Everyone must take measurements and fill out their own data sheetYou must remain on taskIt’s important that we are respectful of other classes