NUTRIENTS
Which is the main energy providing food?
carbohydrates
Excess cholesterol is stored in the blood vessels as _________.
plaque
This microbe causes food poisoning.
bacteria
Name the method of preserving food by lowering temperature.
freezing
Food additives are added to food to improve ________ and __________ (using our sense of touch)
flavour and taste
Give the functions of proteins and fats.
Proteins helps to repair worn out cells and tissues.
Fats provide energy to keep the body warm.
Name two food that are high in cholesterol.
seafood and meat
These microbes cause skin rash and turn bread mouldy.
skin rash - yeast
bread mouldy - mould
By removing oxygen, food can last longer. Name two such ways.
bottling and vacuum packaging
Give 2 examples of natural additives.
pepper, cinnamon, ginger, chilli (any two)
What should a balanced diet look like? It must have ______, _______, ________, ________, _______, _________ and water in the correct proportion.
carbohydrates, fats, proteins, minerals, vitamins, fibres
What causes diabetes and name two health risks related to diabetes.
High sugar level causes diabetes.
Two health risks related to diabetes are diseases related to heart, kidneys and eyes.
________ turns turned milk sour because of ______ produced. However, this microbe is useful in _________.
fungi, acid, cheese making
Name 3 methods of preserving food or materials by using high temperature.
sterilisation, pasteurisation, canning
Besides improving flavour and taste, food additives can also improve texture and a___________, add n_____ value to food and prolong s___________ of food.
appearance,
nutritional,
shelf-life
Minerals and vitamins are needed in small amounts but are important to keep the body healthy. What are the functions of the following minerals and vitamins?
Vitamin C
Vitamin D
Calcium
Iron
Vitamin C - protect body against infection
Vitamin D - strengthen bones
Calcium - strengthen bones and teeth
Iron - carries oxygen in blood / make haemoglobin
1. Obesity can the result of high ______ intake with little _________.
2. Obesity can lead to ___________ , ____________ and ____________.
1. fat intake with little exercise
2. Obesity can lead to heart disease, high blood pressure and diabetes
Food can be preserved by removing water. Besides removing water,
(a) name 2 other methods,
(b) name 3 chemicals that can be added to food to prolong shelf-life
(a) dry freezing / dry freeze
(b)sodium nitrates, sulfur dioxide, benzoic acid
Artificial additives such as s______ n_______, s_____ d________ and b________ acid are added to food to extend the s_____________ to food.
sodium nitrate,
sulfur dioxide,
benzoic acid
shelf life
What 4 main information can you get from food label?
a. nutritional value
b. serving size
c. serving suggestion
d. expiry date
How do you test for the following nutrients in food: starch, proteins and fats?
starch - iodine test, add iodine to the food sample, iodine turns blue black.
proteins - Biuret test, add Biuret solution to food sample, Biuret solution turns to purple
fats - Blot test, paper turns translucent OR ethanol emulsion test, a milk white liquid is observed
Name all the methods of preventing food spoilage.
sterilisation, pasteurisation, canning, freezing, dry freezing, adding chemicals, dehydration, pickling, bottling, vacuum packaging
What is the purpose of preservation of food? How can it be done?
Preservation of food is to reduce microbial activity so that food can remain fresh for a longer period of time.
Food preservation can be done by using high temperature, low temperature, removing water, lowering pH and removing oxygen.