Page 26 - ICC Science Dictionary (spreads)

Word Definition Topic(s) Word Definition Topic(s)

evidence Information or material that shows C9 explosion When parts of a system separate P5
something is true. and move apart. For example,

Data which has been shown to be Thinking a supernova is an exploding star
valid. scientifically - the outer layers are thrown out
into space in all directions.
evolution The change of inherited TB6, B6, B7a,
characteristics within a population B7b exponential A set of numbers that increase B7a, B7b
over time through natural more and more rapidly.
selection, which may result in the extension Increase in length, for example, as P5
formation of a new species. a result of being pulled.
excess In chemistry, a substance is in C1, C3, C4 extinct When no more individuals of a TB6, B7a, B7b
excess if there is more than enough species remain.
of it to react with another reactant. extraction The process of obtaining a C4, C9, C10

exchange A surface where substances, eg B2 metal from a mineral, usually by
surface gases, food substances, wastes, reduction or electrolysis.
are moved across membranes. eyepiece The eyepiece, or ocular, is the B1a, B1b, B2

excreted Discharged as waste B5 lens at the top of a compound
microscope. It has a longer focal
exhalation The process of breathing out. B2
length than the objective lens and
exhale Breathe air out. B5 magnifies the image produced by
the objective.
exoplanet Planet that orbit a star outside our TP5 faeces Waste matter from the bowels. B7a, B7b
solar system.

exothermic Reaction in which energy is given B4, C5, C6, fats Naturally occurring compounds B2
out to the surroundings. The C7, C10 of carbon, hydrogen and oxygen.
surroundings then have more They are esters made from fatty
energy than they started with so acids and glycerol.
the temperature increases. fatty acids Carboxylic acids with a long B2

explain Students should make something Command chain of carbon atoms. Fatty
clear, or state the reasons for word acids react with glycerol to
something happening. produce lipids (fats and oils).

explant A small piece taken from a plant, B6 feedstock A raw material used to provide C7
used in plant cloning. reactants for an industrial reaction.