how do you measure up? 10/9/13 key question: what does volume and mass measure? initial thoughts:
TRANSCRIPT
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How Do You Measure Up? 10/9/13
Key Question: What does Volume and Mass measure?
Initial Thoughts:
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Evidence 1: Notes & Practice
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SI Measurements(also known as “metric system”)
• “SI” stands for “System International” or “International System of Measurement”
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• 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”)
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SI Measurements(also known as “metric system”)
Important BASE units to remember:
METERS = m (measures distance or length)
• Measure with ruler/meterstickruler/meterstick
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LITERS = L (measures volume — how much space something takes up)
• Measure with graduated graduated cylinder/beakercylinder/beaker
• Or with a rulerOr with a ruler (length x height x (length x height x width)width)
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GRAMS = gg (measures mass)• Measure with triple beam triple beam
balance/scalebalance/scale
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oCELSIUS = ooCC (measures temperature)
• Measure with thermometerthermometer
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Important PREFIXES to remember:
k = kilo- (means “10001000”)h = hecto-(means “100100”)D = deca-(means “1010”) BASE UNIT (liter, meter, gram)d = deci-(means “1/10” or 0.11/10” or 0.1)c = centi- (means “1/1001/100” or .01)m = milli- (means “1/10001/1000” or .001)
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Easy way to remember the order of prefixes:
Kids Have
Dreams But
DreamsCost
MoneyMeasurement by Brainpop
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Practice
• 1 meter (think meter stick)
• Equals 100 cm
• Equals 1000mm
• Challenge: How many kilometers?
• 1 meter Equals 1/1000 km
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Triple Beam Balance
• Go to my SWIFT page.
• Click on Links
• Click on Triple Beam Balance Practice
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Evidence contd.
• With your table partner, complete the bottom questions 1-10.
• Reminder: remember Participation. Everyone should be contributing.
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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
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Measuring Liquids
• How many ml of water is shown in the picture?
• Always measure from the bottom of the meniscus.
• Answer: 6.6 ml
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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
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Measuring Mass• What is the mass? Don’t forget to include
units!!!
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Station #9
• Use your hand measurement from the Going the Distance lesson.
• Convert from centimeters to:– Decimeters, meters, decameters, kilometers
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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)?
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Summary
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Reflection:
Come up with your own Metric Mnemonic:
i.e. Kids Have Dreams But Dreams Cost Money Kilo- Hecto- Deca- (BASE) Deci- Centi- Milli-
ORKing Henry Doesn’t Usually Drink Chocolate MilkKilo- Hecto- Deca- (unit) Deci- Centi- Milli-
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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.
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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.
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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