Download Cross Curricular Links

Cross Curricular Links.
Biology
Chemistry
Scientific method
Experimentation
Although not referred to in
the syllabus, the processes of the scientific
method and proper experimentation should
be developed in practical activities.
Elements. Symbols of the elements.(1-36)
Identification of the elements present in
food(C,H,O,N,P,S), dissolved salts
(Na,Mg,Cl,K,Ca), trace
Elements (Fe,Cu,Zn)
I2 – Test for starch. Same blue/black
iodine/starch complex is observed here and with
three activities across.
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The use of Fehling’s solution to test for the
presence of reducing sugars.
Using NaOH and CuSO4 solutions to test for
protein
Fats and oils (lipids)
Digestion of fats to yield fatty (carboxylic acids)
and glycerol.
The use of starch as an indicator for the
presence of iodine in the iodine/thiosulphate
titration, starch as indicator to determine
%(w/v) hypochlorite in bleach, starch as
indicator in the Winkler method to
determine dissolved O2 in water.
The use of Fehling’s to distinguish between
aldehydes and ketones.
NaOH appears widely in chem.. syllabus
and in particular in the determination of
%(w/v) ethanoic acid in vinegar.
Using CuSO4 solutions to illustrate
electrolysis.
Fats and oils as examples of esters.
Hydrolysis of esters to yield carboxylic
acids(fatty acids) and an alcohol.
Saponification of lard producing sodium
sterate (soap) and glycerol.
Biology
Chemistry
Vitamin C (polar) is water soluble
Vitamin D (non polar) is fat soluble
Solubility in polar and non polar solvents.
Solubility of alkanes , alkenes , alkynes,
alcohols etc in water and organic solvents.
Natural fixation of nitrogen. The nitrogen
cycle
The carbon cycle
CO2 and its effect on global warming.
The effects of CFCs on the ozone layer.
Acid rain and its effect on the environment.
The nitrogen cycle
The carbon cycle
Pollution. Study the effect of any one pollutant.
Abiotic factor in a habitat e.g. pH. Use of pH
paper or pH meter.
Effect of pH on enzyme activity.
Definition of enzymes.
The active site theory to explain enzyme
Use of universal indicator paper to measure
pH of solutions.
Use of a pH meter to measure the pH of
water.
Definition of catalyst.
Intermediate formation theory of catalyst.
function and specificity.
Representation of photosynthesis by a balanced
equation. Respiration – representation by a
balanced equation of the overall sequence of
reactions for glucose.
The terms electrons and protons are used
extensively in the study of photosynthesis and
respiration.
Investigate the influence of CO2 on the rate of
photosynthesis.
Chemical equations. Balancing chemical
equations.
Balancing redox equations.
Atomic structure. The students are required
to know the properties of electrons and
protons.
Option 1B studies CO2 in detail.
Biology
Chemistry
Definition of anaerobic respiration.
Fermentation option. alcohol or lactic acid.
Fermentation as a source of
ethanol.
Fermentation as a source of CO2.
Carcinogenic nature of some aromatic
compounds e.g. benzene.
Intermolecular forces e.g. hydrogen bonding
Cancer – definition and two possible causes.
DNA structure
Hydrogen bonding.
Batch and continuous flow food processing.
Carbon dioxide as a controlling factor in
stomatal opening and human breathing.
The use of ppm as units to measure the
concentration of IAA growth regulator on plant
tissue.
Ethene or ethylene as a growth inhibitor.
Involved in the ripening of fruit.
Knowledge that the conduction of a nerve
impulse involves movement of ions.
Batch and continuous chemical processes
Carbon dioxide is referred to in many
sections of the chemistry syllabus. One
section not already referred to is the
production of CO2 during the qualitative test
for CO3- - and HCO3- ions.
Water analysis - using ppm as units to
measure (i) total dissolved and suspended
solids , (ii) measuring total hardness , (iii)
dissolved oxygen and (iv) chlorine in
swimming pool water.
Preparation and properties of ethene gas.
Positive and negative ions.
Minute size of ions.