Page 21 - ICC Science Dictionary (spreads)

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

displacement A reaction that occurs when a more C4, C5 dominant An allele that always expresses itself B6
reaction reactive element replaces a less whether it is partnered by a recessive
reactive element in a compound. allele or by another like itself.
dissipated The spreading out and transfer of P1 donor A person or organism providing an B2
energy stores into less useful forms, organ or tissue for transplant.
such as thermal energy causing dormancy Hibernation for seeds which stops B5
the surroundings to heat up. when they germinate.
Dissipated energy is often referred
to as 'wasted' energy, since it is not dosage The most effective amount of drug B3
transferred to a useful output. needed to cure the disease.
dissipation The process of energy being P1 double bond A covalent bond resulting from C2, C7
transferred, or lost, to the the sharing of four electrons (two
surroundings. pairs) between two atoms.
dissociation The breaking up of a molecule C4 double helix The shape of the DNA molecule B6
into ions when dissolved in water. with two strands twisted together
in a spiral.
dissolve When a substance breaks up and B1a, B1b, C3,
mixes completely with a solvent to C4, C7, C9, draw To produce, or add to, a diagram. Command
produce a solution. C10 word
distance Numerical description of how far P1, P5 drought A long period of low rainfall that C9
apart two things are. For example, creates a major shortage of water.
the distance from Edinburgh to drug A substance that can change B2, B3, P5
Glasgow is approximately 50 miles. chemical reactions in the body.

distillation A separation technique which TC2, C10 ductile The ability of a material to be TC4
involves a solution being heated so drawn out into a thin wire.
that the solvent evaporates before dwarf planet An object orbiting a star that is P8
being cooled to form a pure liquid.
massive enough to be rounded
diverge When a light ray splits up or P6 by its own gravity but has not
spreads out. 'cleared the neighbourhood' of
DNA Deoxyribonucleic acid. The B1a, B1b, B2, other objects and is not a satellite.
material inside the nucleus of cells, B3, B6, C7 dynamo An electrical generator which P7
carrying the genetic information produces direct current, a dc
of a living being. generator.