science revision

Notes
Extraction methods
Distillation converts the volatile liquid
into a vapour and then condenses the
vapour back into a liquid. This gives us oils
such as tea tree oils. Vegetable fats and
oils are lipid materials derived from plants


Emulsion
An emulsion is a mixture of two or more immiscible…

Food additives are substances added to food to preserve flavour or improve its taste
and appearance. Some additives have been used for centuries for example,
preserving food by pickling (with vinegar), salting, as with bacon, preserving sweets or
using sulfur dioxide as in some wines. With the advent of processed…