| Unit II: Food and Nutrition |
|
Specific Objectives
Students should be able to: |
Explanatory notes
|
Suggested Practical Activities
|
|
1. Describe the process of photosynthesis
|
Definition, identification of substrate, conditions and products; word and chemical equations;
outline of process; importance of light, chlorophyll, carbon dioxide and awareness that light energy can be converted to chemical energy.
|
Experiments to establish conditions for photosynthesis, food test, tests for starch as a product of photosynthesis. |
|
2. Discuss balanced and unbalanced diets
|
Wisdom in food selection; read labels to discern nutritive content; discuss food additives and their effects on health; the six food groups, their sources and functions of their main nutrients; balanced diet related to age, sex, occupation; deficiency diseases (PEM).
|
Experiments to measure energy value of food.
|
|
3. Explain the process of digestion in man
|
Physical and chemical digestion; necessity, role of enzymes; stages with enzymes, substrates and products; absorption. |
Draw and label the digestive system of man and state the function of each part;
* identify enzymes, digestive juices and state of acidity/ alkalinity at each stage; experiments on enzymes to show effects of temperature and pH; demonstrate the diffusion of small molecules using a partially permeable membrane; use glucose solution and starch solution.
|
|
4. Explain the role of teeth in digestion.
|
Relationship between structure and function; care of teeth; effect of fluoridation.
|
Draw and label a diagram of a vertical section of a tooth; examine models of individual teeth. |
|
|
|
|
| Go to Section A: unit III: Circulation |
Re: CXC Integrated Science exam guide: Section A: Food and Nutr
bonjour j'aimerai bien avoir des