Transcript 1000 g
Metric Prefixes • One larger thing equals many smaller things Prefix Abbreviation One larger Many smaller centi- (c) 1g= 100 cg kilo- (k) 1 kg = 1000 g Mega- (M) 1 Mg = 1000000 g deci- (d) 1g= 10 dg milli- (m) 1g= 1000 mg micro- (µ) 1g= 1000000 µg Prefix Questions 1. 2. 3. 4. 5. 6. 7. 8. 9. 1000 ______ m = 1 km 0.001 ______km =1m milliliter or centiliter kilogram or megagram millimeter or kilometer centi dollar A penny = 1 ______ deci dollar A dime = 1 ______ 1000000 dollars A megabuck = ________ 10 A kilopenny = __________ dollars (tricky) Prefix to Base Unit Questions 1. 2. 3. 4. 5. kilometers _________ grams _________ liters _________ micrograms _________ Megaseconds _________ Mass of a teaspoon of water Volume of balloon Time light travels from earth to nearest star Episode 104 Conversions • Dimensional Analysis or T-Factor • Convert 152 cm to m – Write in form of a question ? M = 152 cm • Conversion factor – a statement of fact expressed as a fraction equaling one – Allows you to convert from one unit to another unit of measurement • Fact: 1m = 100 cm, so 1m 100 cm • Set units to cancel out or 152 cm 100 cm 1m 1 m 100 cm = 1.52 m • Add numerical values for units • Do the math! Episode 104 Another Conversions • Dimensional Analysis or T-Factor • Convert 62 kg to g – Write in form of a question 62 kg = ? g • Conversion factor • Fact: 1 kg = 1000 g, so • Set units to cancel out 1 kg 1000 g or 62 kg 1000 g 1 kg 1000 g 1 kg = 62000 g • Add numerical values for units • Do the math! Episode 104 Divide or Multiply? • LET THE UNITS TELL YOU! • Convert 1700 µs to ds – Write in form of a question 1700 µs = ? ds • Conversion factor • Fact: 1 s = 1x106µs, so • Fact: 1 s = 10 ds, so 1s 1x106µs 1s 10 ds or • Set units to cancel out • Add numerical values for units 1 s 1700 µs • Do the math! 1x106 µs or 1x106µs 1s 10 ds 1s 10 ds 1 s = 0.017 ds Episode 104 Problem Set One • • • • • • 59 dg to g 5.9 g 9.8 cm to µm 98000 µm 60 L to mL 60000 L 1.4 x 10-7 m to km 1.4 x 10-10 4500 ks to Ms 4.5 Ms How many yards are in 91.44 km? 100000 yds km – (2.54 cm = 1 inch) Episode 104