1.2 Nutrition and health

Natural sciences

Grade 9

Life processes: healthy life

Module 3

Nutrition and health

All over the world there are people who are unhealthy because of incorrect nutrition.

Malnutrition can be caused by either too much or too little food, which leads to diseases related to nutrition. These types of malnutrition can be classified as undernourishment and overfeeding .

Undernourishment:

• 1. Too little nourishment, e.g. anorexia nervosa or bulimia
• Too few proteins, e.g. kwashiorkor
• Too few vitamins, e.g. scurvy and beriberi

Overfeeding:

• Too much of some kinds of nutriment, e.g. obesity

Activity: POSTER

• Collect information on various diseases related to nutrition – divide into groups and make posters to introduce certain illnesses to the class.

• The class must compile and complete a table stating the deficiencies, symptoms and the affected tissues of the following illnesses:
• Scurvy
• Beriberi
• Rachitis/Rickets
• Pellagra
• Kwashiokor
• Anaemia

Discussion on THE HEALTHY DIET

• Discuss different aspects of a healthy diet.

• Name at least five things that should be done to maintain a healthy diet

Assessment: CLASS DISCUSSION AND POSTER

Were you able to supply information and use it to complete the table, poster and question?

LO 1.2; LO 1.3

Assessment

Learning Outcomes 1 : Scientific Investigation

The learner will be able to act confidently on curiosity about natural phenomena, and to investigate relationships and solve problems in scientific, technological and environmental contexts.

We know this when the learner:

• conducts investigations and collects data;
• evaluates data and communicates findings.

Memorandum

CLASS ACTIVITY: POSTER

DISCUSSION ON THE HEALTHY DIET

1. Eat food from all food groups daily and in correct amounts/proportions.

2. Eat plenty of fruit and vegetables.

3. Drink 8 glasses of water.

4. Avoid refined foods and sugars, as well as coffee and alcohol.

5. Eat small amounts of red meat – remove visible fat.