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complete the lab on Metric Measurement

Pre-Lab Questions:

1. In your own words, describe how to calculate density.
2. Explain why the metric system is used in science.
3. In any given experiment, how is it possible for your experimental technique to be both accurate and precise?
4. If you are changing M to cm, what direction do you move the decimal point?

Experiment 1: Metric Measurement Lab
Table 1: Length of Materials

 Material Meters (m) Centimeters (cm) Millimeters (mm) Kilometers (km) Diameter of penny 0.01905m 1.905 19.05 1.905*10^-5 Height of counter/table 0.762m Click here to enter text. Click here to enter text. 7.62*10^-4 Width of textbook 0.219 21.9cm 219mm 2.19*10^-4 Length of room 2.4m to 3.6m 240cm to 360cm 2400mm to 3600mm 0.24km to 0.36km

Table 2: Mass of Materials

 Material Grams (g) Centigrams (cg) Milligrams (mg) Kilograms (kg) Mass of a penny 2.5g 250cg 2500mg 2.5*10^-3 Mass of empty 10 ml graduated cylinder 2.58g 258cg 2580mg 2.58*10^-3 Mass of 10 mL graduated cylinder with 10 mL water 36.5g 3650cg 2,580,000mg 0.0365 Mass of a pencil 8kg 800cg 8000mg 8*10^-3

Table 3: Volume of Materials

 Volume Liters (L) Centiliters (cL) Millileters (mL) Kiloleters (kL) 2 mL 0.002 0.2 2 0.000002 5 mL 0.005 0.5 5 0.000005 6 mL 0.006 0.6 6 0.000006 9 mL 0.009 0.9 9 0.000009

Post-Lab Questions

1. In the metric system what unit of measurement is used for volume?
2. Describe the table that you measured and how the measurement was conducted.
3. Why were you asked to use a 10 mL graduated cylinder to measure volume instead of a 250 mL beaker?
4. Describe the room you measured and how the measurement was conducted.

Table 4A: Day 1 Mass Data

 Materials Grams (g) A. Weight of Paper Towel 2.1g B. Weight of Paper Towel with Gummy Bear 6.5g Weight of Gummy Bear (A-B) *Record this Value in Table 5

Table 4B: Day 2 Mass Data

 Materials Grams (g) A. Weight of Paper Towel 3.0g B. Weight of Paper Towel with Gummy Bear 7.4g Weight of Gummy Bear (A-B) *Record this Value in Table 5

Table 5: Density Gummy Bear Data

DayStart TimeStop TimeBear ColorHead to Toe Length (cm)Arm to Arm Width (cm)Front to Back Thickness (cm)Volume (cm3)Mass (g)Density (g/ cm3)
Day 11700n/aorange2.3cm0.8cm1.3cm1.794cm32.1g1.17g/cm3
Day 2n/a1700tan2.8cm0.9cm1.2cm3.024cm33.0g0.99g/cm3
Difference (Day 1- Day 2)n/an/aMuch paler0.5cm0.1cm0.1cm1.23cm30.9g0.18g/cm3

Post-Lab Questions:

1. What was your hypothesis as to what would happen to the gummy bear? Was it correct?
2. How long did your gummy bear soak? What do you think would have happened if you left it in for twice as long?