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A cat strolls across your backyard. An hour later, a dog with its nose to the ground follows the trail of the cat. Expla

Units of Measurement(p. 33 - 39). CH. 2 - MEASUREMENT. 1.2.4 Distinguish betweeen a quantity, a unit, and a measurement standard.1.2.5 Name SI units for length, mass, time, volume, and density.1.2.7 Perform density calculations.1.2.8 Transform a statement of equality to a conversion

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A cat strolls across your backyard. An hour later, a dog with its nose to the ground follows the trail of the cat. Expla

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    2. Units of Measurement (p. 33 - 39) CH. 2 - MEASUREMENT

    3. 1.2.4 Distinguish betweeen a quantity, a unit, and a measurement standard. 1.2.5 Name SI units for length, mass, time, volume, and density. 1.2.7 Perform density calculations. 1.2.8 Transform a statement of equality to a conversion factor.

    4. Units of Measurement In our daily lives we deal with making measurements routinely. i.e., How much gasoline is required to fill your gas tank? What time did you wake up this morning? How fast did you drive to school today ? Doctors, nurses, pharmacists- Doctors and nurses make measurements constantly. Measurements like pulse rate, blood pressure, temperature, drug dosage. Math - The language of Science Scientists make countless measurements during their experiments to prove or disprove a theory.

    5. Units of Measurement What is your response if I told you that: I weigh 802

    6. Number vs. Quantity Quantity - number + unit

    7. Systems of Measurement

    9. Metric system and the Le Systeme International d'Unites (SI) The Metric system is convenient because it uses only one fundamental unit for each type of measurement, and all of its conversion factors are multiples of 10.

    10. SI Units

    11. SI Units

    12. Derived Units Combination of base units. Volume (m3 or cm3) length ? length ? length

    13. Density

    14. Problem-Solving Steps 1. Analyze 2. Plan 3. Compute 4. Evaluate

    15. Density An object has a volume of 825 cm3 and a density of 13.6 g/cm3. Find its mass.

    16. Density A liquid has a density of 0.87 g/mL. What volume is occupied by 25 g of the liquid?

    17. Unit Conversions (p. 40 - 42) CH. 2 - MEASUREMENT

    18. SI Prefix Conversions 1. Find the difference between the exponents of the two prefixes. 2. Move the decimal that many places.

    19. SI Prefix Conversions

    20. SI Prefix Conversions

    21. SI Prefix Conversions 1) 20 cm = ______________ m 2) 0.032 L = ______________ mL 3) 45 ?m = ______________ nm 4) 805 dm = ______________ km

    22. Dimensional Analysis The “Factor-Label” Method Units, or “labels” are canceled, or “factored” out

    23. Dimensional Analysis Steps: 1. Identify starting & ending units. 2. Line up conversion factors so units cancel. 3. Multiply all top numbers & divide by each bottom number. 4. Check units & answer.

    24. Dimensional Analysis Lining up conversion factors:

    25. Dimensional Analysis How many milliliters are in 1.00 quart of milk?

    26. Dimensional Analysis You have 1.5 pounds of gold. Find its volume in cm3 if the density of gold is 19.3 g/cm3.

    27. Dimensional Analysis How many liters of water would fill a container that measures 75.0 in3?

    28. Dimensional Analysis 5) Your European hairdresser wants to cut your hair 8.0 cm shorter. How many inches will he be cutting off?

    29. Dimensional Analysis 6) Taft football needs 550 cm for a 1st down. How many yards is this?

    30. Dimensional Analysis 7) A piece of wire is 1.3 m long. How many 1.5-cm pieces can be cut from this wire?

    31. Dimensional Analysis How old are you in minutes? Conversion factors: 365 days = 1 year 24 hr = 1 day 60 min = 1 hr

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