2. Observation and Recording Skill Chapter 1 St. Stephen’s College F.3 Biology Mr. Tso

3. Observation and Recording Data Hypothesis Design Results Conclusion Prediction Performing 1.The Stages of Scientific Investigation

4. 2.What is Observation? To observe means to perceive something with the sense organs. Hence, observation includes: Seeing with ; Feeling with ; Tasting with ; Smelling with and Hearing with. eyes skin tongue nose ears

5. A.Qualitative observation This describes a characteristic of an object (such as colour, shape, taste or odour). B.Quantitative observation This involves an amount (such as length, volume, mass or time) or counting. 3.Types of Observation without measurement measuring

6. A.for qualitative observations As no measurement is involved in qualitative observations, this kind of observations can be recorded with words or as shown in the example below: 4.Recording non-numericaldrawings

8. B.for quantitative observations As measurement is involved in quantitative observations, this kind of observations must be recorded in _ _ as shown in the examples below: 4.Recording numbers with units

9. MeasurementInstrumentUnitSymbol of unit Temperaturethermometerdegree Celsius CC Weight milligram; gram; kilogram Length millimetre; centimetre; metre; kilometre Small area surface with regular shape surface with irregular shape Volume solid object with regular shape solid object with irregular shape liquid Concentration of solution Time balancemg; g; kg metre rule mm; cm; m; km metre rule graph paper square millimetre; square centimetre; square metre mm 2 ; cm 2 ; m 2 metre rule measuring cylinder cubic centimetre; cubic metre cm 3 ; m 3 millilitre; litre mL; L balance+M.C. gram per cubic centimetre g/cm 3 stop-watch / clock second; minute; hour s; min;h