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

Mass Ex.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

Statistical Terms Ex1.6 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 is 1 x 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 = kg So the dosage would be 30x45.24 kg =1357mg