Page 48 - ICC Science Dictionary (spreads)

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

peat bog Peat bogs are poorly drained B7a, B7b permeable A substance which allows fluids or B5
areas made up of partially gases to pass through it.
decomposed organic matter due pesticide A chemical used to kill pests, such B7a, B7b, C10
to waterlogging. Peat can be as the potato cyst nematode which
used as a fuel. is a pest that destroys potato crops.

peer review A process by which a scientific C9 petri dish A clear glass or plastic dish, used B3
report is reviewed and checked for to grow living cells from organisms
accuracy by other science experts so they can be studied.
before being published in a journal
or on an official science website. petrochem- Substance made from crude oil C7
ical using chemical reactions.
penetrating The power of the radiation that P4
power demonstrates how far into a petroleum Fuels such as diesel and oil. C7
material the radiation will go. products
penicillin An antibiotic produced by a B3 pH Scale of acidity or alkalinity. A pH TC3, B2, B4,
fungus, Penicillium. Discovered by (power of hydrogen) value below C4, C7, C10
Alexander Fleming. 7 is acidic, a pH value above 7 is
alkaline.
penis Organ which carries sperm out of TB3
the male’s body. pH meter An instrument which can be used C10
to measure the pH of a solution,
percentage A measure of how much product is C3 providing a numerical value which
yield actually made, calculated from: 100 is usually to 1 or 2 decimal places.
× (actual yield) ÷ (theoretical yield).
phagocytes Cells, such as white blood cells, B2, B3
period A horizontal row in the periodic TC1, C1 that engulf and absorb waste
table. material, harmful microorganisms,
periodic A tabular representation of all TC1, C1, P4 or other foreign bodies in the
table known elements in order based on bloodstream and tissues.
atomic number, eg all the noble phagocytosis The process of the ingestion of B2
gases are found on the right of the bacteria or other material by
periodic table. phagocytes.
permanent Magnet made from a magnetic TP3, P7 pharmaceu- Relating to medicines and drugs, B3
magnet material. Its magnetism cannot tical their production, sale and use.
be turned on or off, unlike an
electromagnet.