Page 55 - ICC Science Dictionary (spreads)
P. 55
Word Definition Topic(s) Word Definition Topic(s)
reducing Sugars that act as reducing B2 reinforcement Fibres or other material that C10
sugars agents. Glucose, fructose, lactose make up the bulk of a composite
and maltose are reducing sugars. material.
Sucrose is a non-reducing sugar. relationship A relationship tells us how two or P3
reduction The loss of oxygen, gain of electrons, C4 more variables work together,
or gain of hydrogen by a substance eg the relationship between
during a chemical reaction. resistance, voltage and current is:
reflected There is a reflection when waves P6 resistance = voltage ÷ current.
bounce off a surface. relative The mean relative mass of the C1, C3
reflected ray Light ray leaving a surface or TP2, P6 atomic mass atoms of the different isotopes
boundary. in an element. It is the number
of times heavier an atom is than
reflex action Automatic and rapid response to B5 one-twelfth of a carbon-12 atom.
a stimulus.
relative The sum of the relative atomic C3, C6, C7
reflex arc The pathway of information from B5 formula mass masses of the atoms in a chemical
a sensory neuron through an formula.
inter neuron (or relay neuron) to a
motor neuron. relative mass The relative mass is the number C1
of times heavier a particle is,
refracted Deflected from a straight path. P6 compared to another.
Bent.
relative Different observers judge speeds TP1, TP5
refraction Process by which a wave changes TP2, P6 motion differently if they are in motion too,
speed and sometimes direction so an object’s speed is relative to
upon entering a denser or less the observer’s speed.
dense medium, eg a light ray
changes direction when refracted renewable Energy sources that are replenished C3, P1
by a lens. and not exhausted, eg solar power.
regenerate To restore something to its original B2 renewable Power that is generated using B7a, B7b
form. For example, a catalyst energy natural resources that will not run
is regenerated at the end of a out, eg wind and wave power.
reaction. Certain tissues and renewable Resources which will not run out in C10
organs can regenerate themselves resources the foreseeable future. This could
by producing new cells. be because the reserves of the
resources is huge, or because the
current rate of extraction is low.
