【托福词汇密码】主题词分组词汇表

stratify correlation rift terrane cross-section superposition stratigraphy drift liquefy lava crater volcanic eruption magma mantle tsunami tremor Richter scale epicenter seismic wave seismic intensity seismic earthquake plate tectonics plate supercontinent continental drift theory tectonic plate tectonics lithification sediment accumulation stalagmite stalactite debris deposit crystallize erupt eject alluvial molten extrusive granite limestone sedimentary rock metamorphic rock plutonic igneous rock enforce erode tarnish recede intrude advance into abundant aboriginal evolutionary isolated climatic desertification deforestation reservoir elevation hectare tract chemosynthesis decay accumulate decomposer consumer food chain perish jeopardize poach span section nekton wildlife domestic valley alpine woodland terrestrial aquatic watershed wetland permafrost rain forest community biome biosphere biodiversity biomass ecological system ecosystem yield vibration diameter segment strand pest pesticide insecticide degradation dwindle versatile sturdy misshapen deformed metamorphosis hive colony imago pupate pupae pupa chrysalis caterpillar feed on suck excrete multiply insectivorous flagelliform resilient spiral viscosity elasticity encapsulate ensnare anchor shield swathe startle scare off inedible toxic scale sonar warning color coloration avoidance protection infestation victim destructor threat assault rear spinneret sac spiracle abdominal abdomen mandible antenna compound eye sensor endoskeleton exoskeleton beetle centipede worm spider mite flea cockroach ladybug locust grasshopper butterfly dragonfly mayfly firefly fly mosquito treehopper cicada tiger moth moth honeybee bumblebee wasp termite entomology meadow marshland conserve disperse invade emerge formidable dire devastating graft auxin pigment husk bark stubble resin roost corncob cob maize context fungi fungus moss lichen fern weed lawn grass turf seedling sapling thorn underbrush timber lumber deciduous evergreen tree conifer vegetation wilt shed prune flourish take hold extract phototropism hydrotropism tropism seasonally lush indigenous wild feral juicy airborne brittle perennial transpiration sepal stigma ovary carpel anther stamen nectar