lithosphere

stock

all minerals existing in lithosphere

coog

lowest purity of mineral that can be exploited economically with existing technology

resource

all materials that are theoretically available for exploitation

includes deposits which are currently uneconomic to be exploited

reserve

proportion of a mineral resource that can be exploited now economically with existing technology

haber process formula

n2+2h2= 2nh4

process of dead organic matter turning into ammonia

ammonification

why is phosphate a limiting factor

slow cycle

runs out quickly

limits plant growth

how much of the worlds phosphate rock is in Morocco

90%

what is the slowest biogeochemical cycle and why

phosphate

geological processes are slow

no gas

what does phosphate create in organisms

dna

metamorphic

process where high pressure and high heat forms new aggregate of minerals

tungsten primary ore

wolframite

biological

sediment created by living creature

copper primary ore

chalcopyrite

alluvial placer

minerals deposited by movement of a river

intrusive

igneous rocks cooled below ground large crystals

extrusive

igneous rock cooled above ground small crystals

evaporite

minerals deposited by evaporation eg gypsum

lava

molten rock above ground

protozoic marine sediments

dissolved iron compounds became oxidised by oxygen released by photosynthesis producing insoluble iron oxide deposits