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
13Prefixes K H D base unit d c m Weight of an elephant? An ant? Kilo Hecto Deca meter deci centi milli liter grams Large Medium SmallWeight of an elephant? An ant?Fly length? Distance to Disneyland? Length of finger?Volume of a pool? Amount of juice in a pitcher?Elephant = kg, ant=mgFly length = mm, disneyland = km, finger=cmVolume of pool = kl, juice in a pitcher = l
14Practice 1 meter (think meter stick) Equals 100 cm Equals 1000mm Challenge: How many kilometers?1 meter Equals 1/1000 km
15Triple Beam Balance Go to my SWIFT page. Click on Links Click on Triple Beam Balance Practice
16Evidence contd.With your table partner, complete the bottom questions 1-10.Reminder: remember Participation. Everyone should be contributing.
17Evidence 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
18Measuring Liquids How many ml of water is shown in the picture? Always measure from the bottom of the meniscus.Answer: 6.6 ml
19Measuring 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
20Measuring MassWhat is the mass? Don’t forget to include units!!!
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)?
22Summary Remember: paragraph format What did you think about how volume, mass, and length are measured before this lesson? What did you learn about how volume, mass, and length are measured from this lesson? (Minimum of 3 sentences!!!) What are some further thoughts or questions you have about how volume, mass, and length are measured?
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.