**PART A - BASIC UNITS AND PREFIXES IN THE METRIC SYSTEM**Metric system: based on decimals (base-10 positional notation). Why metric?

Table 1.1 Metric units and abbreviations

`p. 2`* =

**basic**units: meter=m, gram=g, liter=l); abbreviations (k, h, da, d, c, m, µ, n).

**Note:**1 ml = 1 cc (cubic cm; volume is the space occupied by a substance in 3 dimensions, equivalent to length x width x height).Table 1.2 Metric prefixes: Definitions and conversion table.

(kilo ... nano)

**PART B - CONVERTING UNITS WITHIN THE METRIC SYSTEM**`p. 3`To convert from small unit (gram) to large unit (kilogram), move the decimal to the LEFT:

1.0 g = 0.001 kg.To convert from large unit (meter) to small unit (millimeter), move the decimal to the RIGHT:

1.0 m = 1000. mm.Example conversions:

- small unit -> large unit: move decimal to LEFT

72.19 mm = .07219 m - large unit -> small unit: move decimal to RIGHT
`p. 4`

2.945 dag = 29,450 mg

- small unit -> large unit: move decimal to LEFT
**PART C - MEASUREMENT**- Length

Measure microscope slide, student height.`p. 5`

Record on board and write class data in Table 3a of Graphing lab`p. 21`. Data will be used for Graphing lab. - Mass

Measure coin, keys. (Use electronic scales if no triple beam balance) - Section 3 - Volume
`p. 6`

Note volume can be thought as length in 3 dimensions (length * height * width); 1ml = 1cc (cubic cm).

Measure volume of marble with 50 ml graduated cylinder.

Measure volume of drinking glass (~80% of a pint), convert to liter.

Measure from bottom of meniscus of graduated cylinder.`p. 7`

- Length
**PART D - QUESTIONS**

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