possessing or full of holes and permeable to liquids (A1)
Potassium-argon dating
a radiometric dating technique that uses the radioactive isotope potassium- 40, the stable daughter product of which is argon-40 (A1)
Primary consumers
herbivores; animals that eat algae and comprise the second trophic level in marine food webs (M2)
Primary producers
the plants that form the first trophic level in marine food webs (M2)
Pupa
an intermediate stage of a metamorphic insect (such as a moth, ant, or beetle) that is usually enclosed in a…
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Pyroclastic
the word means ‘fire-broken,’ refers to rocks produced in volcanic eruptions (A1)
Quantitative
a restraint upon the transport of goods designed to prevent the spread of diseases or pests (C4)
Queen
a reproductive female ant (A4, C4)
Radio frequency interference
a distortion of image or sound caused by competing electrical signals (A5)
Radioactive decay
a process that involves the formation of daughter products from the original parent isotope (A1)