Page 68 - ICC Science Dictionary (spreads)

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

weight The force acting on an object due TP5, P5 yield The mass of a crop produced. B3, B6, B7a,
to the pull of gravity from a massive B7b
object like a planet. The force acts The mass of product made C10
towards the centre of the planet in a chemical reaction. The
and is measured in newtons (N). percentage yield is a measure of

white blood A type of cell found in blood that B3 the yield obtained compared to
cell defends against infection. the maximum possible yield.
word An equation in which only the C1 zero error Any indication that a measuring Thinking
equation names of the reactants and system gives a false reading when scientifically
products are used to model a the true value of a measured
reaction. quantity is zero, eg the needle on

work The transfer of energy when a TP4 an ammeter failing to return to
force moves an object through a zero when no current flows. A zero
distance. Measured in Newton- error may result in a systematic
meters (or Joules). uncertainty.
Energy transferred by a force. Work P2, P3, P5 zygote A fertilised egg cell. B1a, B1b, B6
done = force × distance moved in
the direction of the force.
work done The amount of energy it takes to P5
do a task. Measured in joules (J).
For example, the work done in
raising a mass through 10 m would
be equal to the gain in potential
energy of the mass.
write Only a short answer is required, not Command
an explanation or a description. word
xylem vessels Narrow, hollow, dead tubes with B2, B4
lignin, responsible for the transport
of water and minerals in plants.
yeast A unicellular fungus used in the B3, C7
brewing and baking industries.