1. Measurement in Science

2. Standard Units Why Standard Units? Data sharing is easier Works in all languages Easier Math Metric System (based on 10) Length = meters (m) Mass (weight?) = kilograms (Kg) or grams (g) Volume = liters (L) Time = seconds (s) Temperature = degrees Celsius ( o C)

3. Why Celsius? Boiling point of water = 100 o C Freezing point of water = 0 o C Fahrenheit was derived from unreliable data sources

4. Choosing Units Scientists choose units that will result in the most meaningful numbers…try these Mass of a penny? Mass of an antibiotic dosage? Length of a caterpillar Diameter of a bacteria cell? Stay in the metric system and standard units Use the correct prefix to scale your units

5. Unit Conversions

6. Unit Conversions All metric units can be adjusted by factors of ten for easier use in different situations Kilo = 1000x Hecta = 100x Deca = 10x Deci = 1/10 Centi = 1/100 Milli = 1/1000 Micro = 1/1,000,000