SI Measurements (also known as “metric system”) “SI” stands for “System International” or “International System of Measurement”
What about it? –Common Language for scientists –Based on units of 10 –Multiply or divide to go up or down when converting units –Prefixes determine “how much” of a unit SI Measurements (also known as “metric system”)
Important BASE units to remember: METERS = m (measures distance or length) ruler/meterstickMeasure with ruler/meterstick
LITERS = L (measures volume — how much space something takes up) graduated cylinder/beakerMeasure with graduated cylinder/beaker Or with a ruler (length x height x width)Or with a ruler (length x height x width)
g GRAMS = g (measures mass) triple beam balance/scaleMeasure with triple beam balance/scale
o C o CELSIUS = o C (measures temperature) thermometerMeasure with thermometer
Important PREFIXES to remember: 1000 k = kilo- (means “1000”) 100 h = hecto-(means “100”) 10 D = deca-(means “10”) BASE UNIT (liter, meter, gram) 1/10” or 0.1 d = deci-(means “1/10” or 0.1) 1/100 c = centi- (means “1/100” or.01) 1/1000 m = milli- (means “1/1000” or.001)
Easy way to remember the order of prefixes: Kids Have Dreams But Dreams Cost Money Measurement by Brainpop
Practice 1 meter (think meter stick) Equals 100 cm Equals 1000mm Challenge: How many kilometers? 1 meter Equals 1/1000 km
Triple Beam Balance Go to my SWIFT page. Click on Links Click on Triple Beam Balance Practice
Evidence contd. With your table partner, complete the bottom questions 1-10. Reminder: remember Participation. Everyone should be contributing.
Evidence 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
Measuring Liquids How many ml of water is shown in the picture? Always measure from the bottom of the meniscus. Answer: 6.6 ml
Measuring VOLUME by displacement Used to measure irregular or non- box shapes. When you can’t measure length x height x width 5.6 – 4.8 = 0.8 ml
Measuring Mass What is the mass? Don’t forget to include units!!!
Station #9 Use your hand measurement from the Going the Distance lesson. Convert from centimeters to: –Decimeters, meters, decameters, kilometers
Analysis Questions 1.Name 2 different base units that could measure the amount of water a fish tank could hold. 2.Why is the number 10 important in the metric system? 3.Why would the prefix “kilo” be more useful than “tera” (1 trillion)?
Reflection: Come up with your own Metric Mnemonic: i.e. Kids Have Dreams But Dreams Cost Money Kilo- Hecto- Deca- (BASE) Deci- Centi- Milli- OR King Henry Doesn’t Usually Drink Chocolate Milk Kilo- Hecto- Deca- (unit) Deci- Centi- Milli-
Big 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.
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.
Metric Olympics You will work with a partner Everyone must take measurements and fill out their own data sheet You must remain on task It’s important that we are respectful of other classes