use of a resource at a rate or to an extent that cannot be sustained over the long term, as…
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Pahoehoe
lava with smooth, billowy, or ropy surfaces (A1)
Paleomagnetic dating
a radiometric dating technique that analyzes variations in the magnetic orientation of minerals in lava flows (A1)
Parasitism
an association between two or more kinds of organisms in which the parasite obtains benefits from a host, which it…
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Pelagic
living in the open ocean (M1)
Percent cover
in coral reef monitoring, the proportion of a given area that is covered by coral (M4)
Permeability rate
how quickly water filters through soil (R1)
Pesticide
a substance toxic to plants or insects used to control their populations (A4, C4)
Photoquadrat method
research technique used to study coral cover or invertebrate species that live on a coral reef; involves photographing portions of…
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Photosynthesis
formation of carbohydrates in the chlorophyll-containing tissues of plants and corals exposed to light (M2)