Food Chemistry
Ink can be a mixture of colour dyes. What method is used to separate the ink dyes?
Paper chromatography
What is the nutrient found in chicken meat?
Chicken meat - protein
Some farmers use predators to reduce the number of pests on their crops. What type of control is this known as?
Biological control
Name 3 food additives can be used as preservatives.
salt
sugar
sulfure dioxide
vinegar
Magnesium reacts with hydrochloric acid. Name the gas produced.
Hydrogen
The enzyme that breaks down fats is known as _____.
lipase
Which two aspects make up health in man?
Physical and mental health
"Slash and burn " is used as a method in agriculture. What 2 negative effects does it have on the environment?
Pollute the environment.
Poor visibility may lead to more motor vehicle accidents.
Give two examples of microbes.
bacteria, fungi (which includes yeasts and moulds)
How do you test for carbon dioxide gas and state the observation.
Bubble carbon dioxide gas into limewater. Limewater turns chalky.
Before fats can be broken down into small soluble particles, it is emulsified by _____ which is produced by the _______.
bile, liver
have sufficient rest, do not smoke, exercise regularly, eat a balanced diet
Improve plant and animal varieties.
Give one example of microbes that is helpful to us.
Microbes turn sugar in milk into acid such as in making yoghurt.
You use detergent and water to remove dirt. What is this method known as?
Dissolving
The results of a food test show violet colour when Biuret solution is added. What food nutrient is present?
protein
Give one structural difference between artery, vein and capillary.
artery - thick wall
vein - thin wall
capillary - wall is one cell thick
Give two examples improving animal varieties to increase food production.
grow cows that give good meat
rear chickens that lay bigger and more eggs
rear animals that grow to larger sizes at a faster rate
Name two ways of preserving food using high temperatures.
sterilisation
pasteurisation
canning
A mixture of alcohol and water can be separated using ______.
distillation
What is a balanced diet?
A diet which contains an equal amount of all the types of food components to sustain a healthy life.
What is the function of valves in some blood vessels. Name this blood vessel.
Valves allow blood to flow in one direction only. Only veins have valves in them.
Give 2 examples of using automation to increase vegetable supply. Describe how one of the automation works.
hydroponics and aeroponics
hydroponics - uses a special nutrient solution to water the plants
aeroponics - spray nutrient solution regularly onto the roots of plants
What are the 3 ways of reducing water content in food?
freeze drying
dehydration
using chemical preservatives