| A) | Aquatic, Aquifer, Arboreal, Assessment, Atmosphere, Aviary |
| B) | Bacteria, Balance, Beach, Behavior, Benefit |
| C) | Calcium, Canopy, Carapace, Cells, Centigrade, Chemical reaction, Classification, Clever, Climate, Coast, Conditions, Constant, Continental, Cool, Creature, Cunning, Current, Cycle |
| D) | Dampness, Decay, Decompose, Deposits, Depth, Disappearance, Discovery, Dislodge, Displace, Dissolve, Distance, Diurnal, Diverse, Drought, Dynamics |
| E) | Ecology, Ecosystem, Elements, Encroach, Endangered, Energy, Environment, Equilibrium, Equine, Essential, Estuary, Evaporation, Event, Evidence, Evolution, Examination, Existence, Expanse, Exploration extinction, Extreme |
| F) | Fauna, Fertile, Fishery, Floodwater, Flora, Flourish, Foliage, Forage, Force, Forecast, Fossil, Fragile, Frigid |
| G) | Grin, Ground water, Growl |
| H) | Habitat, Hatchery, Heat, Humidity, Hydrogen, Hypothesis |
| I) | Ichthyology, Imagination, Impact, Indigenous, Inevitable, Inhabit, Inherit, Inquiry, Integrity, Interact, Interdependence, Investigation |
| M) | Magnetism, Mangrove, Marine, Matter, Measurements, Microbes, Migration, Moisture, Molecule, Motion, Movement, Mysterious |
| N) | Native, Natural, Navigate, Neglect, Negligence, Niche, Nocturnal, Numerous, Nurture, Nutrient |
| O) | Ocean, Oceanography, Omnivorous, Organism, Ornithology, Oxygen |
| P) | Peril, Pesticide, Petrify, Phenomena, Plains, Population, Precipitation, Predator, Preserve, Pressure, Primate, Pristine, Probe, Process, Propagation |
| R) | Rain forest, Reaction, Realm, Reclaim, Reef, Region, Research, Reservoir, Resistance, Rivers, Rookery, Runoff, Rupture |
| S) | Safety, Salvage, Sanitary, Saturation, Scientist, Seafloor, Season, Seepage, Sensor, Shore, Sly, Sound, Species, Spectacular, Spectrum, Stage, Starvation, Streams, Subterranean, Survival, Swamp, Sylvan, Symbiosis, Synergy |
| T) | Taxidermy, Technology, Temperate, Temperature, Terrestrial, Tidal pool, Transformation, Tremor, Tropical, Tundra |
| U) | Ultimate, Unbelievable, Underwater, Unique, Unite, Unity, Universal, Unpredictable, Unusual, Ursine |
| V) | Vanish, Vapor, Variety, Vast, Vegetation, Velocity, Verdant, Viable, Vibration, Virus, Visible, Volume, Vulnerable, Vulpine |
| W) | Waterfall, Waterway, Weather, Wetlands, Wildlife, Wonder, Worldwide |
|
|
|
