Page 188 - Science Coursebook
P. 188
Glossary and index
nucleus (of an atom) the centre positive charge one type of
of an atom formed from protons electric charge 60, 62, 142, 143
and neutrons 60, 61 precipitate an insoluble solid
orbits electronic orbits are the formed when two soluble substances react 110
paths followed by electrons around preliminary work some
the nucleus of the atom 62
practical work you do before an
ore a rock or mineral that contains investigation to find out how you will
a metal compound 90 carry it out. For example you might
organic matter material that find out the range or interval of the
makes up, or has made up, part of a independent variable you will use 73
living organism’s body 30 pressure the force acting per unit
area on a surface 126–131
ovaries the parts of a flower that
contain the ovules 12, 16 principle of moments an object
ovules the parts of a flower that is balanced when clockwise moments
contain the female gametes 12, 16, 17 = anticlockwise moments 134, 135
protons positively charged
oxidation reaction any reaction
where a substance combines with oxygen 71 particles found in the nucleus of an atom 60
quadrat a square area within
particle model the model
of matter in which everything is which you can sample the organisms
composed of particles in motion 121 in a habitat 27
rate of reaction the speed of
pascal the unit of pressure, symbol Pa 128
a reaction, measured by the time
Periodic Table a table of all the taken for the products to form or for
elements placed in order of their reactants to be used up 104 –117
atomic number 62
reactivity how quickly or slowly a
petals the colourful parts of a chemical reacts compared with another 85, 86
flower that help to attract insects 12
reactivity series a list of metals
phytoplankton microscopic in order of how reactive they are.
plant-like organisms that float in water 28 The most reactive are at the top of
pivot the point about which an the list and the least reactive at the bottom 86
object is turned by a force 132 renewable energy resource any
pollen tiny grains, produced in the energy resource which will naturally
anthers of a flower, which contain renew itself 164
the male gametes 12, 14–16 resistance the property of a
pollination the transfer of a component in a circuit which acts to
pollen from an anther to a stigma 14, 15 reduce the current in the circuit 154
pollution the addition of resistant not affected by a
substances to the environment that substance that kills or harms other
harm living organisms 34 organisms; for example, some
bacteria are resistant to certain antibiotics 54
186
