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Measurement & Metrics

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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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**SI Measurements (also known as “metric system”)**

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

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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/meterstick

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**LITERS = L (measures volume — how much space something takes up)**

Measure with graduated cylinder/beaker Or with a ruler (length x height x width)

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**GRAMS = g (measures mass)**

Measure with triple beam balance/scale

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**oCELSIUS = oC (measures temperature)**

Measure with thermometer

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**BASE 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)

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**Kids Have Dreams But Cost Money**

Easy way to remember the order of prefixes: Kids Have Dreams But Cost Money Measurement 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 Name 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)?

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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- OR King Henry Doesn’t Usually Drink Chocolate Milk Kilo 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**

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

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