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Catalyst – August (30+1), 2009

Catalyst – August (30+1), 2009. Of your 10 items that you are thinking about putting in your dream lab, pick one that measures something and describe what it measures. Start Part 1 and Part 2 of the worksheet (6 questions) You should have picked it up from the front lab bench on your way in!.

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Catalyst – August (30+1), 2009

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  1. Catalyst – August (30+1), 2009 • Of your 10 items that you are thinking about putting in your dream lab, pick one that measures something and describe what it measures. • Start Part 1 and Part 2 of the worksheet (6 questions) • You should have picked it up from the front lab bench on your way in!

  2. Today’s Agenda • Catalyst • Short Diagnostic and Reflection • Metric Units and Prefixes • Project Work Time • Exit Question

  3. Today’s Objectives • SWBAT identify SI units and SI prefixes.

  4. Projector Front Door 2nd Period Group 3 Katty, Whitnie, Nicolette, Chevalius Group 1 Neron, Tre, Denny, Chelsea J. Group 2 Darren, Isaac, Isaiah, Robin Group 6 Jared, Brittanee, T’Keyah, Rishad Group 5 Dorian, Elesha, Chelsea C., Chris Group 4 Keith, Jessica, Arethia, Sidne Group 9 Group 7 Kerrie, Jenny, Joseph, Juan Group 8 Timothy, Corian, Byron, Antonio

  5. Projector Front Door 4th Period Group 3 Tashica, Seandell, Kennesha, Lee Group 1 Brittanny V., Brandon, Katelynn, Queirra Group 2 Chelsea, Duan, Shant’a, Victoria Group 6 Darionne, Jordan J., Dajaelle, Kathy Group 4 Phillip, Jordan T., Keyera, Fatina Group 5 Frank, Amanda, Kevin, Brittany P. Group 7 Antrashion, Jayde, James Group 9 Kawanna, Davida, Cole Group 8 Brett, De’Jonnaie Stephanie, Tia,

  6. Measurement Notes Key Point #1: Science uses the International System of Units, also known as (SI) Why do you think scientists do this?

  7. UNITS • Volume uses Liters (L) or Milliliters (mL) • Mass uses Grams (g) • Length uses Meters (m) • Temperature uses Degrees Celsius (C)

  8. Measurement Notes Key Point #2: You can use prefixes to adjust the value of each of these units.

  9. Well fine… what are these prefixes?

  10. Well… ok, we generally only use a couple of them…

  11. Why? • Let’s use a milli- for an example, 10-3 • You can have a… • Milligram – one-thousandth of a gram • Millimeter – one-thousandth of a meter • Milliliter – one-thousandth of a liter • Millidegree Celsius – one-thousandth of a degree Celsius • If Lil’ Wayne was that rich, he’d be singing a mega, a mega, a mega…

  12. Now that we got measurement down, let’s talk about accuracy

  13. Accuracy • Key Point #3: Accuracy is how close you are to the correct or accepted value of a measurement. • Example: Throwing a dart close to the bulls eye • Example: If something is known to have a mass of 500 g and you measure 499 g

  14. Precision • Key Point #4: Precision is how close a series of measurements are to one another. • REPEATABILITY! • Ex: Throwing a dart and hitting the same spot 3 times in a row

  15. Good Accuracy Good Precision Good Accuracy Poor Precision Poor Accuracy Good Precision Poor Accuracy Poor Precision

  16. Precision/Accuracy Activity (15 min) • You will need a package of markers, a bullseye, and a ruler. • Follow directions and have fun.

  17. Work Time • Choices: • Finish picking out your lab equipment • Begin your sketches for your lab – rough draft is key! • Homework this weekend: • Finish Lab and Safety Equipment section • Complete rough draft of plans

  18. Exist Question Write down if it is good or bad accuracy (A) and precision (P). Explain how SI prefixes work.

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