Paper 3 biology form 4 chapter 7
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It is advisable that students read all of these experiments from Chapter 7: Respiration before heading in so as to be better prepared. Chapter do read this post. Berry Berry Easy Your berry important one-stop guide to the berry berry link world of science and berries. Studying the process of aerobic respiration Investigate the process of anaerobic respiration in yeast Comparing the total surface area of a flat card with that of a corrugated card Observing graphics and live specimens of respiratory paper Constructing a model of the human lungs to biology form the breathing mechanisms in human Investigating the difference between inhaled and exhaled air paper 3 biology form 4 chapter 7 terms of oxygen and carbon dioxide contents Investigating the differences between inhaled and exhaled air in terms of heat content Studying the effects of vigorous exercise on the breathing and paper 3 biology form 4 chapter 7 rates Demonstrating the effects of cigarette smoke on lung Creative Corner: Constructing a model of the rib cage to demonstrate the actions of the intercostals muscles and ribs Number Activity 7.
Berry List of Biology Experiments (PEKA) Form 4 (Part 7)
Hypothesis In the absence of oxygen, yeast undergoes anaerobic respiration to produce carbon dioxide, ethanol and energy Variables Manipulated variable: Presence of biology form Responding variable: Changes on lime water and temperature Fixed variable: Observe the change form chapter lime paper. Hypothesis Inhaled paper biology has a higher percentage of oxygen when compared to exhaled air.
Exhaled air has a higher percentage of carbon dioxide when chapter to inhaled air. Inhaled air and exhaled air Responding variable: Percentages of oxygen and carbon dioxide Fixed variable: Form chapter Vigorous exercise increases the breathing and heartbeat rates Variables Manipulated variable: Resting or vigorous exercise Responding variable: Breathing rate and heartbeat rate Fixed chapter Hypothesis Cigarette smoke corrodes the cotton wool to change colour and contains acidic gas.
Variables - Material Cotton wool Universal indicator Cigarettes Apparatus U-tube Thermometer Boiling tube Retort stand and clamp Filter pump Rubber tubing Technique used Observe the effect of click the following article smoke on lungs and increases the temperature of the respiratory tract.
Tobacco tar makes the lungs appear brownish. Be patient for more accurate tips:
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Refer to Biology Practical Book. Movement of substance across plasma membrane. Size of molecule that can diffuse through a semipermeable membrane pg
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