1361719
Questão 1
Questão
Emulsifiers help water and oil mix.
Responda
- True
- False
Questão 2
Questão
The hydrophilic end of each emulsifier molecule bonds to .......
Responda
-
Water molecules
-
Oil molecules
Questão 3
Questão
Ice cream is a food that contains an emulsifier.
Responda
- True
- False
Questão 4
Questão
What do protein molecules do when they have been cooked?
Responda
-
Shrink
-
Expand
-
Change shape
Questão 5
Questão
What happens when you cook a Potatoes?
Responda
-
The inside becomes soft and that makes the potatoes fluffy.
-
The cell walls break down making the starch cells swell up and spread out.
Questão 6
Questão
What chemical reaction does baking powder undergo when heated?
Responda
-
Incomplete combustion
-
Thermal decomposition
Questão 7
Questão
What is the word equation for sodium hydrogen carbonate thermal decomposition?
Responda
-
Sodium hydrogencarbonate - sodium carbonate + carbon dioxide + water
-
Sodium hydrogen carbonate - sodium carbonate + oxygen + water
Questão 8
Questão
Baking powder is used in baking cakes, the carbon dioxide produced makes the cakes rise.
Responda
- True
- False
Questão 9
Questão
Carbon dioxide can be detected using .....
Responda
-
Bromine water
-
Limewater
Questão 10
Questão
Limewater turns cloudy when what is detected.....
Responda
-
Oxygen
-
Carbon dioxide
Questão 11
Questão
The word equation for making esters is:
Acid + alcohol - ester + water
Responda
- True
- False
Questão 12
Questão
Identify the properties that perfumes need.
Responda
-
Non toxic
-
Soluble in water
-
Easily evaporates
-
Flavourings
-
Insoluble in water
-
Doesn't react with water
-
Doesn't irritate the skin
Questão 13
Questão
Polymers are short chains of molecules.
Responda
- True
- False
Questão 14
Questão
Polymers are made by heating a catalyst and the double bond of small monomers breaks open and is able to join with another monomer.
Responda
- True
- False
Questão 15
Questão
What is the reaction of making polymers called?
Responda
-
Polymerisation
-
Carbon based polymer
Questão 16
Questão
What is gore-tex?
Responda
-
A breathable fabric that allows water to evaporate but doesn't let any water in.
-
A stretchy fabric used to make clothes.
Questão 17
Questão
Most polymers aren't biodegradable, why is this a problem?
Responda
-
They aren't broken down by micro organisms so they don't rot.
-
Water ruins it.
Questão 18
Questão
Why do we cook food?
Responda
-
Change taste, change texture, kill bacteria, easier to digest.
-
Smells nicer, tastes nicer, kill bacteria.
Questão 19
Questão
What statements are correct about Alkanes.
Responda
-
They are made from only hydrogen and carbon atoms.
-
All Alkanes have single bonds.
-
Alkanes are unsaturated compounds.
-
Alkanes have double bonds.
-
Alkanes are saturated compounds.
Questão 20
Questão
What is fractional distillation used for?
Responda
-
Separating crude oil.
-
Preparing crude oil.
Questão 21
Questão
Is this the equation for incomplete combustion of a hydrocarbon?
Hydrocarbon + oxygen - carbon dioxide + water + carbon monoxide + acid
Responda
- True
- False
Questão 22
Questão
How do you calculate energy?
Responda
-
Mass x specific heat x temp = mcT
-
Weight x heat x volume = mcT
Questão 23
Questão
What is exothermic?
Responda
-
Heat given out.
-
Heat taken in.
Questão 24
Questão
What is endothermic?
Responda
-
Heat given out.
-
Heat taken in.
Questão 25
Questão
Flavour enhances are a type of emulsifier.
Responda
- True
- False
Questão 26
Questão
What are the environmental problems with oil?
Responda
-
Oils spills.
-
Wars.
-
Acid rain.
-
Global warming.
-
Extinction.
Questão 27
Questão
Political problems with oil are .....
Responda
-
Wars over pipelines.
-
Global warming.
-
Rise In oil prices.
Questão 28
Questão
You need heat and a catalyst to be able to perform cracking.
Responda
- True
- False
Questão 29
Questão
What is cracking?
Responda
-
The splitting up of long chain hydrocarbons.
-
Another name for fractional distillation.
Questão 30
Questão
Double covalent bonds Make up what kind of polymer?
Responda
-
Addition polymer
-
Polymerisation.
Questão 31
Questão
What is crude oil formed from?
Responda
-
The buried remains of plants and animals.
-
Buried rocks in the ocean.
Questão 32
Questão
What does cracking do?
Responda
-
Helps match supply to demand.
-
Makes more crude oil.
Questão 33
Questão
The word equation for complete combustion of any hydrocarbon is ....
Hydrocarbon + oxygen - carbon dioxide + water
Responda
- True
- False
Questão 34
Questão
What is the definition of health?
Responda
-
A state of physical, social and mental well-being.
-
Being free from infection and disease.
Questão 35
Questão
What is the definition of Fit?
Responda
-
A measure of how well you can perform a physical task.
-
The same as health.
Questão 36
Questão
How do you measure fitness?
Responda
-
Strength
-
Stamina
-
Agility
-
Flexibility
-
Speed
-
Blood pressure
-
Age
Questão 37
Questão
Systolic pressure is when blood pressure is at its highest when the heart contracts.
Responda
- True
- False
Questão 38
Questão
What is blood pressure measured in?
Responda
-
mm of mercury
-
Cm
Questão 39
Questão
What can increase your blood pressure?
Responda
-
Smoking
-
Being overweight
-
Too much alcohol
-
Constant stress
-
Age
-
Unhealthy diet
Questão 40
Questão
What can health problems can high blood pressure lead to?
Responda
-
Strokes
-
Kidney damage
-
Brain damage
-
Lung damage
Questão 41
Questão
Kwashiorkor is caused by eating too little protein.
Responda
- True
- False
Questão 42
Questão
You calculate BMI using the following formulae:
BMI = body mass
(Height)2
Responda
- True
- False
Questão 43
Questão
Types of pathogens:
Responda
-
Fungi
-
Flu
-
Bacteria
-
Viruses
Questão 44
Questão
A malignant tumour is where the tumour grows and can spread to other sites in the body.
Responda
- True
- False
Questão 45
Questão
Types of drugs:
Responda
-
Depressants
-
Stimulants
-
Coffee
-
Painkillers
-
Performance enhancers
-
Hallucinogens
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