Refraction is the bending of a wave when it
enters a medium where the speed is different.
INSULIN
A hormone, produced by the
pancreas, which controls the blood
glucose concentration.
EMULSIFIERS
A chemical that
can used to make
sure that oil and
water remain
mixed.
AUXIN
A plant hormone
that affects the
growth and
development.
INTERMOLLECULAR
FORCES
Intermolecular forces are forces of attraction
or repulsion which act between neighboring
particles (atoms, molecules or ions). They are
weak compared to the intramolecular forces,
the forces which keep a molecule together.
CRACKING
Breaking down (decomposition of) long chain
hydrocarbons into smaller, more useful, short
chain hydrocarbons
ALKENE
An unsaturated (i.e
at least on C=C)
hydrocarbon
ALKANE
A saturated (i.e only single
bonds) hydrocarbon
POLYMERISATION
The chemical reaction where
monomers are used to make
polymers
COLLOID
A colloid is a substance in which
microscopically dispersed insoluble
particles are suspended throughout
another substance.
EYE
IRIS
A thin, circular
structure in the
eye, responsible
for controlling
the diameter and
size of the pupil
and thus the
amount of light
reaching the
retina. The color
of the iris gives
the eye its color.
RETINA
The back of the
eye; contains light
sensitive
cells/receptors
GLYCOGEN
Glycogen is a multibranched
polysaccharide of glucose that
serves as a form of energy
storage in animals and fungi.
The polysaccharide structure
represents the main storage
form of glucose in the body.
HAEMOGLOBIN
Every time you come to give
blood or platelets we check your
haemoglobin level. Haemoglobin,
or 'Hb', is a protein found in the
red blood cells that carries
oxygen around your body and
gives blood its red colour.