definitions
what is matter
anything that takes up space and had mass
define mixtures
a combination of two substances that keep some of their own properties
define food additives
any substance added to food for a specific purpose
what are the nutrients
minerals, lipids,proteins, carbohydrates, vitamins, water
what do emzymes do
breaks down other substances
examples of physical properties
color, melting and freezing point, temp, odor
define solutions
a homogeneous mixture ,a solute is dissolved in solvent
what does it mean to be synthetic
it was made in a lab
what do proteins do
build and repair muscle
how do enzymes work
attach to a substrate at the active site
define chemical properties
Ability of a substrane to react with other substances
define solubility
The maximum amount of solute that can be dissolved in a definite amount of solvent at a certain temperature
who regulates food additives
FDA,WHO,FAO
what do vitamins do
heal and help immune system
what does heat do to enzymes
kills them
what are phases
solid, liquid, gas
define colloidal dispersion
large particles are dispersed in a substance without dissolving
four purposes for food additives
where do you get vitamins from
citrus fruits, eggs
what is the best pH level
7-10
what is a pure subtance
one kind of material that has the same compositions
define emulsion
colloidal dispersion that a mixture of two liquids that do not normally blend with eachother
what are the benefits of food additives
safety, more access to food, convenience
what do proteins come from
dairy, meat
what do leavening agents do
make dough and bread rise