Observation and Recording Skill Chapter 1 St. Stephen’s College F.3 Biology Mr. Tso.
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Transcript of Observation and Recording Skill Chapter 1 St. Stephen’s College F.3 Biology Mr. Tso.
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Observation and Recording
Skill Chapter 1
St. Stephen’s College F.3 Biology Mr. TsoSt. Stephen’s College F.3 Biology Mr. Tso
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Observation and Recording Data
Hypothesis
Design
Results
Conclusion
Prediction
Performing
1. The Stages of Scientific Investigation
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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
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A. Qualitative observationThis describes a characteristic of anobject (such ascolour, shape, taste or odour).
B. Quantitative observationThis involves an amount(such as length, volume, mass or time)or counting.
3. Types of Observation
without measurement
measuring
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A. for qualitative observationsAs no measurement is involved inqualitative observations, this kind ofobservations can be recorded with words or asshown in the example below:
4. Recording
non-numerical drawings
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B. for quantitative observationsAs 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
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Measurement Instrument Unit Symbol of unit
Temperature thermometer degree Celsius 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
balance mg; g; kg
metre rule mm; cm; m; km
metre rule
graph paper
square millimetre; square centimetre; square metre
mm2; cm2; m2
metre rule
measuring cylinder
measuring cylinder
cubic centimetre; cubic metre
cm3; m3
millilitre; litre mL; L
balance+M.C. gram per cubic centimetre g/cm3
stop-watch / clock
second; minute; hour s; min;h