Page 64 - ICC Science Dictionary (spreads)

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

toxicity Poison level. P4 transmission Where waves travel through a TP2
medium rather than be absorbed
toxin A type of natural poison produced B3, B6 or reflected.
by an organism, often as a form of
protection. The spreading of pathogenic B3
disease, for example by touch,
trachea The windpipe, the tube that leads B2, B3 food, water.
from the mouth towards the lungs.
transmission Thick cables used to carry P2
trachea Carries air from the mouth and TB4 lines electricity long distances through
(windpipe) nose to the lungs. the National Grid.
transect A line created, for instance, with B7a, B7b transmitted A wave is passed across or P6
a tape measure, along which through a material (medium),
sampling occurs. eg light waves are transmitted
transformer An electrical device that P2, P7 through air, glass and water.
increases, or decreases, the transparent A material that allows all light to TP2, C10, P6
potential difference (voltage) of pass directly through it.
an alternating current.
transpiration The loss of water from leaves by B2
transgenic Describes an organism that has B7a, B7b evaporation through the stomata.
undergone genetic modification
and has had genes transferred transplant Surgical procedure in which a B1a, B1b
from another unrelated organism. tissue or organ is replaced.

transition A metal that is located in between C1 transport A body system specialised to B2
element groups 2 and 3 of the periodic table system transport molecules and ions in
and has coloured compounds. multicelluar animals and plants.
transition Any of the metallic elements TC1 transverse A wave that moves in a direction TP2, P6
metal occupying a central block in wave at right angles to the way in which
the periodic table, e.g. iron and the particles are vibrating.
manganese. trophic level The position of an organism in a B7a, B7b

translocation The transport of dissolved material B2 food chain, food web or pyramid.
within a plant. true value This is the value that would be Thinking
translucent A material that allows light to pass TP2, P6 obtained in an ideal measurement. scientifically
through it, but the light is scattered. tsunami A large destructive wave caused P6
by earthquakes, volcanic activity
or landslides under water.