The Metric System & its Unit Conversions

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Presentation transcript:

Phenomenon: Chemists use units to express different types of measurements.

The Metric System & its Unit Conversions Base Units Measures second (s) meter (m) liter (L) gram (g) temperature quantity of substance pressure

~~~~~~~~ ~~~~~~~~~~~~ BASE UNITS ~~~~~~~~~~~~~~~~ The 6 Major Prefixes The Big & The Small Prefix Symbol Meaning Example Thousand 1 kg = 1,000 g Hundred 1 hg = 100 g Ten 1 Dg = 10 g ~~~~~~~~ ~~~~~~~~~~~~ BASE UNITS ~~~~~~~~~~~~~~~~ Tenth (0.1) 10 dg = 1 g Hundredth (0.01) 100 cg = 1 g Thousandth (0.001) 1000 mg = 1 g

The Ladder Method

The Ladder Method K H D d c m 4 km = _________ m 12 Dg = _________ dg Meters Liters Grams 4 km = _________ m 12 Dg = _________ dg Starting Point Ending Point

The Ladder Method K H D d c m Meters Liters Grams Try these conversions using the ladder method. 1000 mg = _______ g 1 L = _______ mL 160 cm = _______ mm 14 km = _______ m 109 g = _______ kg 250 m = _______ km 56 cm 6 m 7 g 698 mg Compare using <, >, or =.

The Ladder Method K H D d c m Meters Liters Grams Which of the following measurements are the equivalent? 25 g 2500 dg 2500 mg .025 kg

Dimensional Analysis An analysis of the relationship between different units of measure using conversion factors.

Dimensional Analysis An analysis of the relationship between different units of measure using conversion factors. Convert 3598 grams into pounds. (1 lb = 454 g)

Dimensional Analysis An analysis of the relationship between different units of measure using conversion factors. Convert 5 miles to inches. (1mi = 5280 ft; 1 ft = 12 in)

Dimensional Analysis An analysis of the relationship between different units of measure using conversion factors. How many seconds pass by if you sleep for 8 hours?