E N D
Comparison Chart English system length: inches, feet mass: ounces, lbs Volume: pints, gallons temp: °F Metric system length: meters mass: kilograms volume: liters temp: °C, °K
Metric Units-Ex 1.1 • Conversion of metric units and expression • in scientific notation .. • k h da base d c m μ n p are pre-fix symbols • gram, liter, meter are units in metric • Using prefix will help in metric conversions • Eg. Kg is kilogram unit for weight • Kl is kilolitre fo volume • Km is kilometer for distance
Ex 1.2 • Length • Take meter stick and identify: • m, dm, cm, mm. • Calculate lab book, lab partner,index finger • Area = length x width • Calculate Area for lab book • Dime measurement: thickness is 1 mm • measure one dime, calculate the rest
Volume-Ex 1.3 • Pure water: • 1cc = 1ml = 1g 1dm3 = 1L = 1Kg • glassware, identify and know how to read markings on: • beakers • graduated cylinders • graduated pipettes • Erlenmeyer flasks
Volume cont. • meniscus (water’s adhesive property) • pipette filling device - pump • know which pipette size is best for specified volumes • Eg 5 ml is for measuring 4.5 ml • 2ml is for 1.7 ml
MassEx .1.4 • Know how to use: • triple beam balance- for measuring Beaker, Lab book • electronic scale-for measuring light weights eg paper clip • Bathroom scale-for measuring yourself • Measure mass of volume of water using this equation: • 1ml = 1gm = 1dm3
Temperature-Ex 1.5 • Temperature • At sea level: • freezing point = 0°C 32°F • boiling point = 100°C 212°F • Determine temperature of four water baths in °C • and convert to °F. Convert real life applications. • Hot plate is used to boil water,Use tongs .. • • Know formulas for temperature conversions • °F = 9/5 °C + 32 • °C = 5/9 (°F – 32) • Kelvin scale (K) • 0°K is absolute zero, all molecular motion • ceases • 0°K = -273°C so °K = °C + 273 7
Statistical TermsEx1.6 • Mean : average of measurements • Median : middle value • Range : the smallest to largest values • Deviation : + or – from the mean • Variance : sum of deviations2 • Std. Deviation : sq.root of variance
Ex 1.7 Graphs • Graphs are used to help you to visualise data • Refer to page 21 for data • Graph on page 22
Scientific Notation • Expression of numbers by using powers of 10 • 1000.0 is 1 x 103 • .000010 is 1X 10-5
Medical Importance • Medical calculations -Usage of this is in hospitals when drug dosages are calculated.. • If 30 mg of drug is to be given to 1kg of patient,his weight is 100 pounds.What dosage should you administer? • Answer:1Kg is 2.21 pds ,so 100 pds will be • 100/2.21 = 45.24 kg • So the dosage would be 30x45.24 kg =1357mg