Gap-fill worksheet question Quiz "Useful Products - Food Additives"

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   antioxidants      bacterial growth      emulsifier      food additives      hydrophilic      hydrophobic      intelligent packaging      layers      mayonnaise      nitrogen      oxygen      preservatives      water   
1. There are many chemicals called are used in the food industry to help keep food and drinks fresh and reduce .

2. There are substances called which prevent reactions between (in air) from reacting with food. You can also achieve the same effect by replacing air with gas e.g. to stop the fat in crisps from going rancid - this is an example of what is called .

3. Another method of preserving food is to remove (dehydrate it) from it which reduces the medium in which you can get .

4. Other perform other functions other than keeping packaged food fresh.

5. For example in order to get vegetable oil and water based food ingredients to mix e.g. in , you need to add an to keep the mixture uniform and not separate out into . An molecule has an 'oil loving'/'water hating' () tail and a 'water loving'/'oil hating' () end which links the oil and water keeping them intimately mixed up and not reforming two .