A - B - C alternative fuel biofuel carrying capacity centimeter biodiversity coextinction biotic abiotic cause competition biomass consumer (primary, secondary, tertiary) carnivore cultural service compete convection compaction cementation M - N - O meter mass mass extinction natural resources nonrenewable materials ocean acidification mutually beneficial niche native omnivore maintain metamorphic rock | D - E - F exponential growth fossil fuel evidence fieldwork extinction effect ecosystem food web energy energy pyramid ecosystem service evaluate erosion deposition P - Q - R predator prey producer provisional service regulating service rock cycle polymer raw material renewable resource synthetic material | G - H - I gram habitat degradation habitat invasive species herbivore igneous rock S - T - U - V volume supporting service sediments sedimentary rock | J - K - L liter J-curve limiting factors W - X - Y - Z weathering |