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WorksheetsThe Science of Food - Year 10
Total questions: 27
Worksheet time: 16mins
Sensory characteristics of food include?
Appearance, aroma, cost & availability
Appearance, aroma, flavour & texture
Taste, aroma, sweetness & strength
Odour, aroma, appetite & cost
A suitable list of words to describe texture could include:
Appetising, burnt, bland & smooth
Appetising, crumbly, fruity & sweet
Sweet, salty, sour & bitter
Crisp, crumbly, lumpy & smooth
Dextrinisation occurs when _________________ is exposed to dry heat. The missing word is?
Starch
Dextrin
Sugar
Monosaccharides
Choose all of the examples of dextrinisation
Toast
Golden surface of a cake
A cut apple browning
Toasted muesli
Caramel sauce
Which best describes the functional property of gelatinisation?
The setting of gelatine on cooling
The swelling of protein to form a gel
The blending of starch with cold water to form a paste
The swelling of starch when heated in water
What temperature range is needed for gelatinisation?
>4°C
12−18°C
>100°C
55−85°C
Examples of gelatinisation include:
Boiled rice
Porridge made from oats
Honeycomb
Meringues
White sauce
Reading people, hearing, tasting, smell, touching
The functional properties of CARBOHYDRATES include:
Emulsification and Aeration.
Crystallisation, Caramelisation, Dextrinisation and Gelatinisation.
Browning, Foaming, Gelation and Coagulation.
The functional properties of FATS include:
Emulsification and Aeration.
Crystallisation, Caramelisation, Dextrinisation and Gelatinisation.
Browning, Foaming, Gelation and Coagulation.
The image depicted is a baked custard made from eggs milk & sugar. It changes from a liquid to a solid due to?
Coagulation
Gelatinisation
Dextrinisation
Oxidation
Carbohydrates are found in all animal foods
True
False
Dry heat is required for dextrinisation
True
False
Meat browns because of caramelisation
True
False
What are proteins made up of?
sacharides
amino acids
fats
triglycerides
When making meringue, why do we whisk egg whites?
to trap air
to denature the proteins
to mix it up
to make it white
Aeration occurs when
fat and flour are blended
fat & eggs are baked
fat & sugar are creamed
fat & sugar are stirred
Which of the following images depict Maillard reaction?
Mrs Lee's light & fluffy cupcakes were leavened by:
Steam
Yeast
Baking powder
Kneading
Jane made a salad dressing from oil, vinegar, egg yolk & herbs. It did not separate when she left it in the fridge. Why did the salad dressing remain stable?
Egg contains lecithin which is an emulsifying agent.
Jane used olive oil which mixes well with vinegar
Jane used 11 secret herbs & spices
The egg yolk coagulated trapping the oil in the vinegar making it a stable emulsion
Custard made from custard powder is an example of:
Crystallisation.
Coagulation
Dextrinisation
Gelatinisation
Agitation such as beating, stirring, whisking or folding can affect a functional property.
True
False
Examples of recipes which use hydration include?
Grilled fish
Chia pudding
Risotto
Roast lamb
Read the recipe for Martha’s Lemon Soufflé
During step three what functional properties caused the mixture to thicken?
Ingredients
2 tablespoons white sugar (for sprinkling)
4 large egg yolks (at room temperature)
1 tablespoon plain flour
1 tablespoon finely grated lime rind
¼ cup white sugar (extra)
½ cup milk
20gm butter
2 tablespoons lemon juice
5 large egg whites (at room temperature)
Icing sugar to serve
Method
1. Preheat oven to 190C/170C fan forced. Grease six 1-cup capacity soufflé dishes. Dust with icing sugar.
2. Whisk egg yolks, flour, rind and 1 tablespoon of extra white sugar in a heatproof bowl.
3. Bring milk to boil in a small saucepan over medium heat. Slowly pour milk into yolk mixture, whisking constantly to prevent yolks from cooking. Return mixture to pan. Whisk over medium heat for 1-2 minutes or until mixture is thick enough to coat the back of a wooden spoon. Strain through a sieve. Whisk in butter and lemon juice.
4. Using an electric mixer, beat egg whites until foamy. Gradually add remaining 2 tablespoons of extra white sugar. Beat until soft peaks form. Stir a third of the egg white mixture into yolk mixture. Gently fold in remaining egg white mixture.
5. Fill each soufflé dish to top. Smooth top and run your thumb around edges to remove batter from rims.
6. Bake on a rimmed oven tray for about 16 minutes or until soufflés rise and are golden. Dust with icing sugar.
7. Serve immediately, before soufflés lose their height.
Hydration & dextrinisation
Gelatinisation & coagulation
Gelatinisation & caramelisation
Coagulation & evaporation
The conditions needed for the growth of yeast are?
Cool, dark place with food
Warmth, mositure, bacteria & time
Dry heat, food, moisture & energy
Warmth, moisture, food & time
Joe was making lemon meringue cupcakes and when he went to pipe the meringue mixture on top of the cakes it was too runny. What conditions may have caused this to occur?
Egg yolk in the mixture
Adding the sugar all at once
Using a bowl with an oily residue
All of the above
This photo is one of Jamie Oliver's recipes called Creviche. The fish is marinated in chilli & lemon juice. No cooking is involved but the texture & colour of the fish change after marinating. Why?
The fish is sahimi & doesn't need cooking
Chilli has caused denaturation
Coagulation has taken place due to the lemon juice which is acidic.
The acidic lemon juice has cooked the fish resulting in the maillard reaction
