IGCSE Biology CIE 0610 Y9 Nutrition Different Diets PDF

IGCSE Biology- CIE 0610 Learn this! Notes Y9 Nutrition: Different Diets What is a A balanced diet means having the right proportion of the different food balanced diet? groups to provide enough energy to the person. Different people Diffe...

IGCSE Biology- CIE 0610 Learn this! Notes Y9 Nutrition: Different Diets What is a A balanced diet means having the right proportion of the different food balanced diet? groups to provide enough energy to the person. Different people Different people need different amounts of energy in their have different diet according to their lifestyle. energy requirements For example: from their diet - A teenager has higher energy needs than an elderly person as they require energy for growth - Active people (perhaps their job) require more energy than non-active people as their muscles are respiring faster. - Males usually have higher energy needs than females - Pregnant women have higher energy needs than non-pregnant women. - Breastfeeding women have higher energy needs than non-breast feeding. The FACTORS - age that affect the - gender (sex) requirements in - body mass/weight a diet are: - Lifestyle or activity level - occupation - pregnancy & breastfeeding. Also note, females between the ages of 13 and 50 also need a higher iron content in their diet. As they menstruate each month (have their period), they lose blood which contains iron. How can we To carry out this experiment, you need to: measure the amount of 1. pour cold water into a boiling tube energy in food? 2. record the starting temperature of the water 3. record the mass of the food sample 4. heat the food until it catches fire 5. heat the water using the flame from the burning food 6. record the final temperature of the water + calculate the rise in temp. Energy is often measured in kilojoules (kJ) per 100g of food.  Test yourself Q & A Questions Answer 1 State what is meant by the term a diet that contains all the necessary balanced diet? nutrients; in the required quantities or correct proportions; for sex / age / activity; to maintain health / for healthy living for energy needs 2 List 4 factors that affect the differing age; gender; activity; during energy needs of people. pregnancy and whilst breast-feeding; 3 What unit is energy measured in? kJ ( kilojoules)