2.4 - Healthy food

2.4 - Healthy food
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2.4 - Healthy food

Slide 1 - Diapositive

Today's lesson
1. Review HW Q8 pg. 122
2. Formative test
3. The wheel of five
4. Energy
5. Weight and BMI
6.  Eating disorders
7. Start BS 6 - Nutrition and digestion in mammals

Slide 2 - Diapositive

HEALTHY FOOD
  • Provides all the nutrients you need (carbohydrates, fats, protein, water, minerals & vitamins)
  • Does not contain more energy than you need. 
  • Does not contain a lot of sugar, fat & salt. 

Slide 3 - Diapositive

Wheel of five

Slide 4 - Diapositive

Energy
- most food is burned as fuel
-unit of energy is the Joule (j)
-1 kilojoule = 1,000 joules
-can also measure in calorie (cal)
- I kilocalorie = 1,000 cal
1 kcal = 4.2 kJ

Slide 5 - Diapositive

Amount of energy 
-depends on gender, age, body size, exercise, climate, season
-examples:
  1. sleeping = 4.2kJ per min
  2. walking = 16.7 kJ per min
  3. jogging = 29.3kJ per min
  4. climbing stairs = 46.1 kJ/m


Slide 6 - Diapositive

BODY MASS INDEX 

Slide 7 - Diapositive

Are you in balance?

  1. Overweight?
  2. Underweight?

Slide 8 - Diapositive

Eating disorders
Anorexia nervosa:  lose extreme amounts of weight
Bulimia nervosa:  vomit to get rid of the food, use large amounts of laxatives
Binge eating disorder: moments of eating a lot 

Slide 9 - Diapositive

Slide 10 - Vidéo