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Map
A
- A Horizon
- Abiotic
- Ablation
- Ablation Zone
- Abrasion
- Absolute Humidity
- Absolute Zero
- Absorption
- Absorption (Atmospheric)
- Abstract Space
- Abyssal Fan
- Abyssal Plain
- Acclimation
- Accretion
- Accumulation
- Accumulation Zone
- Acid
- Acid Deposition
- Acid Precipitation
- Acid Rain
- Acid Shock
- Acidic
- Acidic Solution
- Actinomycetes
- Active Layer
- Active Remote Sensing
- Actual Evapotranspiration
- Actual Mixing Ratio
- Adaptation
- Adaptive Radiation
- Adiabatic
- Adiabatic Cooling
- Advection
- Advection Fog
- Aeolian
- Aeolian Landform
- Aerial Photography
- Aerobic
- Aftershock
- Aggradation
- Agronomy
- Air Mass
- Air Pollution
- Air Pressure
- Albedo
- Aleutian Low
- Alfisols
- Algae
- Alien Species
- Alkaline
- Allele
- Allelopathy
- Allogenic Succession
- Allopatric Speciation
- Allophane
- Alluvial Fan
- Alluvial Terraces
- Alluvium
- Alpha Particle
- Alpine Glacier
- Alpine Permafrost
- Alpine Tundra
- Alternative Hypothesis (H1)
- Altitude
- Altocumulus Clouds
- Altostratus Clouds
- Amensalism
- Amino Acid
- Ammonia
- Ammonium
- Amphibian
- Amphibole
- Anaerobic
- Andesite
- Andisols
- Anemometer
- Aneroid Barometer
- Angiosperms
- Angle Of Incidence
- Angle Of Repose
- Animal
- Animalia
- Anion
- Annual Plant
- Antarctic Circle
- Antarctic High
- Anticline
- Anticyclone
- Aphelion
- Applied Physical Geography
- Aquatic
- Aquiclude
- Aquifer
- Aquifer Recharge Area
- Archaea
- Archaebacteria
- Archean
- Archipelago
- Arctic Circle
- Area Studies Tradition
- Arête
- Aridisols
- Arkose
- Artesian Water
- Artesian Well
- Asexual Reproduction
- Assimilation
- Asthenosphere
- Astronomy
- Atmosphere
- Atmospheric Pressure
- Atmospheric Stability
- Atoll
- Atom
- Atomic Energy
- Atomic Mass Number
- Atomic Number
- Atomic Weight
- Aurora
- Autogenic Succession
- Autotroph
- Autumnal Equinox
- Available Water
- Average Global Temperature
- Azimuth
- Azonal Soil
- Azores High
B
- B Horizon
- Background Extinction
- Backscattering
- Backshore
- Backshore Slope
- Backswamp
- Backwash
- Bacteria
- Badlands
- Bajada
- Bank-Caving
- Bar
- Barchan Dune
- Barometer
- Barrier Beach
- Barrier Island
- Basal Sliding
- Basalt
- Basalt Plateau
- Basaltic Magma
- Base
- Base Flow
- Base Level
- Basement Rock
- Basic
- Basic Solution
- Basin
- Batholith
- Bay
- Bay-Mouth Bar
- Bayhead Beach
- Beach
- Beach Drift
- Bearing
- Beaufort Wind Scale
- Bed
- Bed Load
- Bedding Plane
- Bedrock
- Benthos
- Bergschrund
- Berm
- Bermuda High
- Beta Particle
- Biennial Plant
- Bifurcation Ratio
- Big Bang
- Big Crunch
- Biodiversity
- Biogeochemical Cycling
- Biogeography
- Biological Amplification
- Biological Weathering
- Biomass
- Biome
- Bioregion
- Biosphere
- Biotic
- Biotic Potential
- Biotite
- Bird
- Black Body
- Blizzard
- Blowout Depression
- Body Wave
- Bog
- Bolson
- Bora
- Boreal Forest
- Bottomset Bed
- Boulder
- Bowen Reaction Series
- Brackish
- Braided Stream
- Breaker
- Breccia
- Brine
- British Thermal Unit (Btu)
- Bromeliad
- Brunisol Soil
C
- C Horizon
- Calcification
- Calcite
- Calcium Carbonate
- Caldera
- Caldera Volcano
- Caliche
- Calorie
- Calving
- Cambrian
- Cambrian Explosion
- Canadian High
- Canadian Shield
- Canadian System Of Soil Classification
- Canopy Drip
- Canyon
- Capillary Action
- Capillary Water
- Carbohydrate
- Carbon Cycle
- Carbon Dioxide
- Carbon Monoxide
- Carbonate
- Carbonation
- Cardinal Points
- Carnivore
- Carrying Capacity (K)
- Cartography
- Cascading System
- Catastrophism
- Cation
- Cation Exchange
- Cation Exchange Capacity
- Cave
- Cavitation
- Cell
- Cellular
- Cellulose
- Celsius Scale
- Cenozoic
- Central Vent
- Centripetal Force
- Chain Reaction (Nuclear)
- Chalk
- Chaparral
- Chelate
- Chelation
- Chemical
- Chemical Autotroph
- Chemical Energy
- Chemical Reaction
- Chemical Weathering
- Chemosynthesis
- Chernozem Soil
- Chinook Wind
- Chlorofluorocarbons (CFCs)
- Chlorophyll
- Chloroplast
- Chromosome
- Cinder Cone Volcano
- Circle Of Illumination
- Circum-Pacific Belt
- Cirque
- Cirque Glacier
- Cirrocumulus Clouds
- Cirrostratus Clouds
- Cirrus Clouds
- Classification
- Clastic Sedimentary Rock
- Clay
- Cleavage
- Cliff
- CLIMAP Project
- Climate
- Climatic Optimum
- Climatology
- Climax Community
- Climograph
- Clone
- Closed System
- Closed Talik
- Cloud
- Coal
- Coastal Dune
- Coastal Wetland
- Coastal Zone
- Coastline
- Coefficient Of Determination
- Coevolution
- Col
- Cold Desert
- Cold Front
- Cold Glacier
- Colonization
- Comet
- Commensialism
- Community
- Community Boundary
- Compass
- Competition
- Competitive Exclusion
- Composite Volcano
- Composites
- Compound
- Concrete Space
- Condensation
- Condensation Nuclei
- Conduction
- Cone Of Depression
- Confined Aquifer
- Confined Groundwater
- Conglomerate
- Coniferous Vegetation
- Conservation Biology
- Consumer
- Contact Metamorphism
- Continental Arctic Air Mass (A)
- Continental Crust
- Continental Divide
- Continental Drift
- Continental Effect
- Continental Glacier
- Continental Ice Sheet
- Continental Margin
- Continental Plate
- Continental Polar Air Mass (cP)
- Continental Rise
- Continental Shelf
- Continental Shelf Break
- Continental Shield
- Continental Slope
- Continental Tropical Air Mass (cT)
- Continuous Permafrost
- Contour (Line)
- Contour Interval
- Control System
- Convection
- Convection Current
- Convectional Lifting
- Convectional Precipitation
- Convergence
- Convergence Precipitation
- Convergent Lifting
- Coordinated Universal Time (UTC)
- Coral
- Coral Bleaching
- Coral Reef
- Core
- Coriolis Force
- Correlation Coefficient
- Coulee
- Counter-Radiation
- Crater
- Craton
- Creep
- Cretaceous
- Crevasse
- Critical Entrainment Velocity
- Crust
- Cryosol Soil
- Cryostatic Pressure
- Cryotic
- Cumulonimbus Cloud
- Cumulus Cloud
- Cuspate Foreland
- Cyanobacteria
- Cyclogenesis
- Cyclone
- Cytoplasm
D
- Day Length
- Daylight Savings Time
- Debris Flow
- Deciduous Vegetation
- Declination
- Decomposer
- Decomposition
- Deduction
- Deflation
- Deflation Hollow
- Deforestation
- Degradation
- Delta
- Dendritic
- Denitrification
- Density (of Matter)
- Denudation
- Deoxyribonucleic Acid (DNA)
- Dependent Variable
- Deposition
- Deposition Nuclei
- Depositional Landform
- Depression
- Deranged Drainage
- Desert
- Desert Pavement
- Desertification
- Detachment
- Detrital Rock
- Detritivore
- Detritus
- Detritus Food Chain
- Deuterium
- Devonian
- Dew
- Dew Point
- Diffused Solar Radiation
- Diffusion
- Diorite
- Dip
- Diploid
- Direct Solar Radiation
- Discharge
- Discontinuous Permafrost
- Dispersal
- Dissociation
- Dissolution
- Dissolved Load
- Distance Ratio
- Distributary
- Distributional Limit
- Disturbance
- Diurnal Tide
- Divergence
- Divergent Evolution
- Diversity (Species Diversity)
- Divide
- Doldrums
- Dolomite
- Downwelling Current
- Drainage Basin
- Drainage Density
- Drainage Divide
- Drainage Network
- Drainage Pattern
- Drainage Wind
- Drift
- Drought
- Drumlin
- Dry Adiabatic Lapse Rate (DALR)
- Dry Line
- Dry-Bulb Thermometer
- Dune
- Dune Field
- Dust Dome
- Dyke
- Dynamic Equilibrium
- Dynamic Metamorphism
- Dyne
E
- Earth Albedo
- Earth Revolution
- Earth Rotation
- Earth Sciences Tradition
- Earthflow
- Earthquake
- Earthquake Focus
- Easterly Wave
- Easting
- Ebb Tide
- Eccentricity
- Ecological Diversity
- Ecological Niche
- Ecology
- Ecosphere
- Ecosystem
- Ecosystem Diversity
- Ecotone
- Eddy
- Eddy Diffusion
- Edge Wave
- Effusive Eruption
- El Nino
- Elastic Deformation
- Elastic Limit
- Elastic Rebound Theory
- Elastic Wave
- Electrical Energy
- Electromagnetic Energy
- Electromagnetic Radiation (Waves)
- Electromagnetic Spectrum
- Electron
- Element
- Eluviation
- Emigration
- Emissivity
- Endangered Species
- Endogenic
- Energy
- Energy Flux
- Entisols
- Entrainment
- Entropy
- Environment
- Environmental Gradient
- Environmental Lapse Rate (ELR)
- Environmental Science
- Environmental System
- Enzyme
- Eolian
- Eolian Landform
- Eon
- Epicenter
- Epiphyte
- Epoch
- Equator
- Equilibrium
- Equinox
- Era
- Erg Desert
- Erosion
- Erosional Landform
- Erratic
- Esker
- Establishment
- Estimator
- Estuary
- Eukaryota
- Eukaryote
- Eustacy
- Eutrophic Lake
- Eutrophication
- Evaporation
- Evaporation Fog
- Evaporation Pan
- Evaporite
- Evapotranspiration
- Evergreen Vegetation
- Evolution
- Exfoliation Dome
- Exogenic
- Exosphere
- Exotic Stream
- Experiment
- Exploitation
- Explosive Eruption
- Extinction
- Extrusive Igneous Rock
- Eye
F
- Facilitation
- Facilitation Model Of Succession
- Fahrenheit Scale
- Fall
- False Origin
- Falsification
- Fault
- Fault Plane
- Fault Scarp
- Feedback Loop
- Feldspar
- Felsic Magma
- Fen
- Fermentation
- Fern
- Ferrel Cell
- Ferricretes
- Fertilizer
- Fetch
- Field Capacity
- Firn
- Firn Limit
- Firn Line
- First Law Of Thermodynamics
- Fish
- Fission (Nuclear)
- Fissionable Isotope
- Fissure
- Fitness
- Fixed Energy
- Fjord
- Flash Flood
- Flocculation
- Flood
- Flood Basalt
- Flood Tide
- Floodplain
- Fluid
- Fluid Drag
- Fluvial
- Focus
- Fog
- Fold
- Folding
- Foliar Leaching
- Foliation
- Food Chain
- Food Web
- Foot Wall
- Force
- Force Of Acceleration
- Foreset Bed
- Foreshock
- Forest
- Forminifera
- Fossil
- Fossil Fuel
- Föhn Wind
- Freeze-Thaw Action
- Freezing
- Freezing Rain
- Freons
- Fresh Water
- Friction
- Frictional Force
- Front
- Frontal Fog
- Frontal Lifting
- Frontal Precipitation
- Frost
- Frost Creep
- Frost Point
- Frost Wedging
- Fujita Tornado Intensity Scale
- Fundamental Niche
- Fungi
- Funnel Cloud
- Fusion (Nuclear)
G
- Gabbro
- Gaia Hypothesis
- Galaxy
- Gall-Peters Projection
- Gamete
- Gamma Radiation
- Gap
- Gas
- Gelifluction
- Gelisols
- Gene Frequency
- Gene Pool
- Gene(s)
- General Circulation Model (GCM)
- Generalist Species
- Genetic Adaptation
- Genetic Diversity
- Genus
- Geocoding
- Geodesy
- Geographic Cycle
- Geographic Information Systems (GIS)
- Geographic Isolation
- Geographic Range
- Geographical Coordinate System
- Geography
- Geoid
- Geologic Time Scale
- Geology
- Geomorphic Threshold
- Geomorphology
- Geostationary Orbit
- Geostrophic Wind
- Geothermal Energy
- Germination
- Glacial (glaciation)
- Glacial Drift
- Glacial Ice
- Glacial Lake
- Glacial Milk
- Glacial Polish
- Glacial Retreat
- Glacial Surge
- Glacial Trough
- Glacial Uplift
- Glacial Valley
- Glacier
- Glaciofluvial
- Glaze
- Gleization
- Gleysol Soil
- Global Positioning System (GPS)
- Global Warming
- Glucose
- Gneiss
- GOES (Geostationary Operational Environmental Satellite)
- Graben Fault
- Graded Stream
- Gradient
- Gradient Wind
- Granite
- Granitic Magma
- Graphic Scale
- Grass
- Grassland
- Graupel
- Gravel
- Gravitational Water
- Gravity
- Grazing Food Chain
- Great Circle
- Greenhouse Effect
- Greenhouse Gases
- Greenwich Mean Time (GMT)
- Grid North
- Grid South
- Gross Primary Productivity
- Gross Secondary Productivity
- Gross Sediment Transport
- Ground Fog
- Ground Frost
- Ground Ice
- Ground Moraine
- Groundwater
- Groundwater Flow
- Groundwater Recharge
- Gulf Stream
- Gust Front
- Gymnosperm
- Gypsum
- Gyre
H
- Habitat
- Hadean
- Hadley Cell
- Hail
- Hair Hygrometer
- Half-life
- Halite
- Hamada
- Hanging Valley
- Hanging Wall
- Haploid
- Hardpan
- Hawaiian High
- Hazard
- Headlands
- Headwaters
- Heat
- Heat Capacity
- Heat Energy
- Heat Island
- Helical Flow
- Herb
- Herbivore
- Heredity
- Heterogeneity
- Heterosphere
- Heterotroph
- High Pressure
- Histosols
- Holistic
- Holocene Epoch
- Homeostatic (Homeostasis)
- Homosphere
- Horizon
- Horn
- Horst Fault
- Host
- Hot Spot
- Human Geography
- Human-Land Tradition
- Humidity
- Humus
- Hurricane
- Hydration
- Hydraulic Gradient
- Hydrocarbon
- Hydrograph
- Hydrologic Cycle
- Hydrology
- Hydrolysis
- Hydrosphere
- Hydrostatic Pressure
- Hygrometer
- Hygroscopic
- Hygroscopic Coefficient
- Hygroscopic Water
- Hyphae
- Hypothesis
- Hypothesis Testing
I
- Ice
- Ice Age
- Ice Cap
- Ice Fall
- Ice Field
- Ice Fog
- Ice Jam
- Ice Lense
- Ice Pellets
- Ice Sheet
- Ice Shelf
- Ice Wedge
- Iceberg
- Icelandic Low
- Ideal Gas Law
- Igneous Rock
- Illuviation
- Immigrant Species
- Immigration
- Inceptisols
- Independent Variable
- Index Contour
- Indicator Species
- Induction
- Industrial Revolution
- Industrial Smog
- Inferential Statistics
- Infiltration
- Infiltration Capacity
- Infiltration Rate
- Infrared Radiation
- Inhibition Model Of Succession
- Inner Core
- Inorganic
- Inosilicate
- Input
- Insect
- Inselberg
- Insolation
- Insolation Weathering
- Instability
- Interaction (biological)
- Interception
- Interference
- Interglacial
- Intermittent Stream
- International Date Line
- Interspecific
- Intertropical Convergence Zone (ITCZ)
- Intraspecific
- Intrusive Igneous Rock
- Inverse Square Law
- Inversely Proportional
- Inversion
- Invertebrate
- Ion
- Ionizing Radiation
- Ionosphere
- Island Arc
- Isobar
- Isolated System
- Isoline
- Isostacy
- Isostatic Depression
- Isostatic Rebound
- Isotherm
- Isothermal Layer
- Isotope
- Isotopic Dating
J
K
- K-selected Species (Logistic Strategy)
- Kame
- Kame Terrace
- Kaolinite
- Karst
- Katabatic Wind
- Kelvin Scale
- Kettle Hole
- Kettle Moraine
- Keystone Species
- Kilocalorie (Kcal)
- Kilopascal (kPa)
- Kilowatt (kW)
- Kinetic Energy
- Kingdom
- Kirchoff's Law
- Knickpoint (British Spelling)
- Köppen Climate Classification
L
- La Nina
- Lagoon
- Lahar
- Lake
- Laminar Flow
- Land Breeze
- Landfall
- Landsat
- Landslide
- Landward
- Langley
- Latent Heat
- Latent Heat Flux
- Latent Heat Of Condensation
- Latent Heat Of Vaporization
- Lateral Moraine
- Laterite
- Laterization
- Latitude
- Latosol
- Laurasia
- Lava
- Lava Flow
- Law Of Basin Areas
- Law Of Conservation Of Energy
- Law Of Stream Lengths
- Law Of Stream Number
- Law Of The Minimum
- LDC
- Leachate
- Leaching
- Leaf Drip
- Lee
- Leeward
- Legume
- Less Developed Country (LDC)
- Levee
- Liana
- Lichen
- Light
- Light Year
- Lightning
- Lignite
- Limestone
- Limiting Factor
- Lipid
- Liquefaction
- Liquid
- Lithification
- Lithosphere
- Litter
- Litterfall
- Little Climatic Optimum
- Little Ice Age
- Littoral Drift
- Littoral Transport
- Littoral Zone
- Loam
- Lobe
- Location
- Loess
- Logarithmic Scale
- Long Wave
- Longitude
- Longshore Current
- Longshore Drift
- Longshore Transport
- Longwave Radiation
- Lovelock, James E.
- Low Pressure
- Lower Mantle
- Luvisol Soil
- Lysimeter
M
- Macronutrient
- Mafic Magma
- Magma
- Magma Plume
- Magnetic Declination
- Magnetic Field
- Magnetic North
- Magnetic Reversal
- Magnetic South
- Magnetosphere
- Magnitude
- Mammal
- Mangrove
- Mantle
- Map
- Map Projection
- Map Scale
- Marble
- Marine
- Maritime Effect
- Maritime Polar Air Mass (mP)
- Maritime Tropical Air Mass (mT)
- Mass
- Mass Balance
- Mass Extinction
- Mass Movement
- Mass Number
- Mass Wasting
- Matric Force
- Matter
- Maunder Minimum
- MDC
- Mean
- Mean Sea-Level
- Mean Solar Day
- Meander
- Medial Moraine
- Median
- Mediterranean Scrubland
- Melting
- Meltwater
- Mercalli Scale
- Mercator Projection
- Mercury Barometer
- Meridian
- Meridional
- Meridional Transport
- Mesa
- Mesocyclone
- Mesopause
- Mesophyte
- Mesoscale Convective Complex
- Mesosphere
- Mesotrophic Lake
- Mesozoic
- Metabolism
- Metamorphic Rock
- Metamorphism
- Metasomatic Metamorphism
- Meteor
- Meteorology
- Methane
- Mica
- Micronutrient
- Microorganism
- Microwave Radiation
- Mid-Latitude Cyclone
- Mid-Oceanic Ridge
- Migration
- Milankovitch Theory
- Military Grid Reference System
- Milky Way Galaxy
- Miller Cylindrical Projection
- Millibar (mb)
- Mineral
- Mineralization
- Mississippian
- Mistral
- Mitochondria
- Mixed Tide
- Mixing Ratio
- Mode
- Model
- Moho Discontinuity
- Moist Adiabatic Lapse Rate
- Molecule
- Mollisols
- Mollweide Projection
- Monera
- Monocline
- Monsoon
- Montmorillonite
- Montreal Protocol
- Moraine
- More Developed Country (MDC)
- Morphological System
- Morphometry
- Moss
- Mountain Breeze
- Mouth
- Movement
- Mudflow
- Mudstone
- Multispectral Scanner (MSS)
- Muscovite
- Muskeg
- Mutation
- Mutualism
- Mycorrhizae
N
O
- O Horizon
- Oblique Aerial Photograph
- Obliquity
- Obsidian
- Occluded Front
- Ocean
- Ocean Basin
- Ocean Current
- Ocean Floor
- Ocean Trench
- Oceanic Crust
- Oceanic Plate
- Oceanography
- Oil
- Old Growth Forest
- Oligotrophic Lake
- Olivine
- Omnivore
- One-Tailed Statistical Test
- Onshore-Offshore Transport
- Open Sea
- Open System
- Open Talik
- Opisometer
- Optimum
- Ordovician
- Organ
- Organelle
- Organic
- Organic Matter
- Organic Soil
- Organism
- Origin
- Orogenesis
- Orogenic Belt
- Orographic Precipitation
- Orographic Uplift
- Orthographic Projection
- Outcrop
- Outer Core
- Outgassing
- Output
- Outwash
- Outwash Plain
- Overbank Flow
- Overland Flow
- Overthrust Fault
- Overturned Fold
- Oxbow Lake
- Oxidation
- Oxisol
- Ozone
- Ozone Hole
- Ozone Layer
- Ozonosphere
P
- P-Wave
- Pacific High
- Paleoclimate
- Paleoclimatology
- Paleolake
- Paleosol
- Paleozoic
- Palsa
- Pan Or PAN
- Pangaea
- Parallel
- Parametric Tests
- Parasite
- Parasitism
- Parent Material
- Particulate Matter
- Parts Per Billion (ppb)
- Parts Per Million (ppm)
- Parts Per Thousand (ppt)
- Passive Remote Sensing
- Paternoster Lakes
- Pathogen
- Patterned Ground
- Peak Annual Flow
- Peat
- Pebbles
- Pediment
- Pediplain
- Pedogenesis
- Pedogenic Regime
- Pedology
- Pedon
- Pennsylvanian
- Perched Water Table
- Percolation
- Perennial Plant
- Peridotite
- Periglacial
- Perihelion
- Period
- Periodic Table
- Permafrost
- Permeability
- Permian
- Peroxyacetyl Nitrate (PAN).
- PH
- Phanerozoic
- Phase Change
- Phloem
- Photochemical Smog
- Photodissociation
- Photogrammetry
- Photon
- Photoperiod
- Photoperiodism
- Photosphere
- Photosynthesis
- Photosynthetic Autotroph
- Phylogenic Classification
- Phylum
- Physical Geography
- Physical Weathering
- Phytoplankton
- Piedmont Glacier
- Pigment
- Pingo
- Pioneer Community
- Pioneer Species
- Pitted Topography
- Place
- Plagioclase Feldspar
- Plane Of The Ecliptic
- Planet
- Plankton
- Plant
- Plantae
- Plastic Deformation
- Plate Tectonics
- Plateau Basalt
- Platform
- Playa
- Pleistocene Epoch (Ice Age)
- Plucking
- Pluton
- Podzol Soil
- Podzolization
- Point Bar
- Polar Axis
- Polar Cell
- Polar Easterlies
- Polar Front
- Polar High
- Polar Jet Stream
- Polar Stratospheric Clouds
- Polar Vortex
- Pollutant
- Pollution
- Polycyclic Landform
- Polygenetic Landform
- Polypedon
- Pool
- Population
- Population Crash
- Population Density
- Population Parameter
- Pore Ice
- Porosity
- Positive Feedback
- Potential Energy
- Potential Evapotranspiration
- Ppb
- Ppm
- Ppt
- Precambrian
- Precambrian Shield
- Precession Of The Equinox
- Precipitable Water
- Precipitate
- Precipitation
- Predation
- Predator
- Prediction
- Pressure
- Pressure Gradient Force
- Pressure Melting Point
- Prevailing Wind
- Prey
- Primary Carnivore
- Primary Consumer
- Primary Pollutant
- Primary Producer
- Primary Succession
- Primary Wave
- Prime Meridian
- Probability
- Process-Response System
- Producer
- Productivity
- Progradation
- Progressive Succession
- Prokaryote
- Propagule
- Proportional
- Protein
- Proterozoic
- Protista
- Proton
- Protoplasm
- Protozoa
- Proxy Data
- Psychrometer
- Psychrometric Table
- Pyramid Of Biomass
- Pyramid Of Numbers
- Pyroclastic Material
- Pyroxene
Q
R
- R Horizon
- R-Selected Species (Malthusian Strategy)
- Radarsat
- Radiant Energy
- Radiation
- Radiation Fog
- Radioactive Decay
- Radioisotope Or Radioactive Isotope
- Radiometer
- Rain
- Rain Gauge
- Raindrop Impact
- Rainshadow Effect
- Rainsplash
- Rainwash
- Random
- Range
- Rangeland
- Re-Entrants
- Reach
- Realized Niche
- Recessional Moraine
- Recharge Area
- Rectangular Coordinate System
- Recumbent Fold
- Recurrence Interval
- Reduction
- Reef
- Reference Map
- Reflected Infrared Radiation
- Reflected Wave
- Reflection
- Reflection (Atmospheric)
- Refraction
- Reg
- Region
- Regional Metamorphism
- Regolith
- Regosol Soil
- Relative Humidity
- Relief
- Remote Sensing
- Remote Sensor
- Representative Fraction
- Reptile
- Resource
- Resource Partitioning
- Respiration
- Retrogressive Succession
- Reverse Fault
- Revolution
- Rhumb Line
- Rhyolite
- Ria Coast
- Ribbon Falls
- Ribonucleic Acid (RNA)
- Richter Scale
- Riffle
- Rift
- Rift Valley
- Rill
- Rime
- Ring Of Fire
- Rip Current
- Ripple
- River
- Robinson Projection
- Roche Moutonnee
- Rock
- Rock Cycle
- Rock Flour
- Rock Slide
- Rockfall
- Roll Cloud
- Rossby Wave
- Rotation
- Rotational Slip
- Runoff
S
- S-Wave
- Salinity
- Salinization
- Salt
- Salt Marsh
- Saltation
- Saltwater Intrusion
- Sample
- Sand
- Sand Dune
- Sand Ripples
- Sand Sea
- Sand Sheet
- Sand Wedge
- Sandstone
- Santa Ana Wind
- Saturated Adiabatic Lapse Rate (SALR)
- Saturation
- Saturation Mixing Ratio
- Savanna
- Scale
- Scarification
- Scattering (Atmospheric)
- Schist
- Science
- Scientific Method
- Sclerophyllous Vegetation
- Scour
- Scree
- Sea
- Sea Arch
- Sea Breeze
- Sea Smoke
- Sea Stack
- Sea-Floor Spreading
- Sea-Level
- Sea-Level Pressure
- Seamount
- Seasons
- Seaward
- Seawater
- Second Law Of Thermodynamics
- Second-Growth Forest
- Secondary Carnivore
- Secondary Consumer
- Secondary Pollutant
- Secondary Substance
- Secondary Succession
- Secondary Wave
- Sedge
- Sediment
- Sediment Rating Curve
- Sedimentary Rock
- Seed
- Seed Bank
- Seed Dispersal
- Seepage
- Seepage Lake
- Segregated Ice
- Seif
- Seismic
- Seismic Wave
- Seismograph
- Seismology
- Self-Regulation
- Semi-Diurnal Tide
- Sensible Heat
- Sensible Heat Flux
- Sexual Reproduction
- Shale
- Shear Stress
- Shear Wave
- Sheet Flow
- Sheeting
- Sheetwash
- Shield
- Shield Volcano
- Shore
- Shoreline
- Short Wave
- Shortwave Radiation
- Shrub
- Sial Layer
- Siberian High
- Sidereal Day
- Silcretes
- Silica
- Silicate
- Silicate Magma
- Sill
- Silt
- Siltstone
- Silurian
- Sima Layer
- Sink
- Sinkhole
- Sinusoidal Equal-Area Projection
- Slaking
- Slate
- Sleet
- Sling Psychrometer
- Slip-Face
- Slope Aspect
- Slope Failure
- Slump
- Small Circle
- Smog
- Snout
- Snow
- Snow Line
- Snow Melt
- Snow Pellets
- Snowfield
- Soil
- Soil Colloids
- Soil Creep
- Soil Erosion
- Soil Fertility
- Soil Horizon
- Soil Moisture Recharge
- Soil Organic Matter
- Soil Permeability
- Soil Porosity
- Soil Profile
- Soil Science
- Soil Solution
- Soil Structure
- Soil Taxonomy
- Soil Texture
- Soil Water
- Soil-Heat Flux
- Solar Altitude
- Solar Constant
- Solar Day
- Solar Energy
- Solar Noon
- Solar Radiation
- Solar System
- Solar Wind
- Solar Year
- Solid
- Solifluction
- Solonetzic Soil
- Solstice
- Solum
- Solution
- Source Region
- South Magnetic Pole
- South Pole
- Southeast Trade Winds
- Southern Oscillation
- Space
- Spatial Analysis
- Spatial Isolation
- Spatial Tradition
- Specialist Species
- Speciation
- Species
- Species Association
- Species Diversity
- Specific Gravity
- Specific Heat
- Specific Humidity
- Spectrum
- Speed Of Light
- Spheroidal Weathering
- Spit
- Spodosols
- Sporadic Permafrost
- SPOT (Centre National D'Etudes Spatiales)
- Spring
- Spring Tide
- Squall Line
- Stability
- Stable Atmosphere
- Stable Equilibrium
- Stadial Moraine
- Stage
- Standard Atmospheric Pressure
- Standard Deviation
- Star
- Starch
- State Of Matter
- Static Equilibrium
- Stationary Front
- Steady State Equilibrium
- Steam Fog
- Stemflow
- Stephan-Boltzmann Law
- Steppe
- Stoma (pl. Stomata)
- Storm Surge
- Storm Track
- Stoss
- Strata
- Stratified Drift
- Stratigraphy
- Stratocumulus Clouds
- Stratopause
- Stratosphere
- Stratovolcano
- Stratus Clouds
- Stream
- Stream Bank
- Stream Bed
- Stream Channel
- Stream Discharge
- Stream Flow
- Stream Gradient
- Stream Load
- Stream Long Profile
- Stream Order
- Striations
- Strike
- Strike-Slip Fault
- Structural Landform
- Subatomic Particles
- Subduction (Tectonic)
- Subduction Zone
- Sublimation
- Submarine Canyon
- Subpolar Glacier
- Subpolar Lows
- Subsea Permafrost
- Subsidence
- Subsolar Point
- Subtropical High Pressure Zone
- Subtropical Jet Stream
- Succession
- Succulent Vegetation
- Sugar
- Sulfate Aerosol
- Sulfur Dioxide
- Sulfuric Acid
- Summer
- Summer Solstice
- Sun
- Sunrise
- Sunset
- Sunspot
- Super-Saturation
- Supercooled Water
- Surface Creep
- Surface Heat Flux
- Surface Tension
- Surface Wave
- Surge
- Suspended Load
- Suspension
- Sustainable Development
- Swash
- Swell
- Symbiotic
- Symbiotic Mutualism
- Syncline
- Synoptic Scale
- System
- System Attribute
- System Boundary
- System Element
- System Relationship
- System State
T
- Taiga
- Taku
- Talik
- Talus
- Talus Slope
- Tarn
- Taxon
- Taxonomic Classification
- Tectonic Plate
- Tectonics
- Temperate Deciduous Forest
- Temperate Glacier
- Temperate Rain Forest
- Temperature
- Temperature Inversion
- Tephra
- Terminal Fall Velocity
- Terminal Moraine
- Terminal Velocity
- Terminus
- Terrace
- Tertiary
- Tertiary Consumer
- Tetrahedron
- Texture
- Thalweg
- Thematic Map
- Thematic Mapper
- Theory
- Thermal Circulation
- Thermal Equator
- Thermal High
- Thermal Infrared Radiation
- Thermal Low
- Thermal Metamorphism
- Thermocline
- Thermodynamic Equilibrium
- Thermodynamic Laws
- Thermokarst
- Thermometer
- Thermosphere
- Third Law Of Thermodynamics
- Threatened Species
- Threshold
- Threshold Velocity
- Through Talik
- Throughfall
- Throughflow
- Thrust Fault
- Thunder
- Thunderstorm
- Tidal Current
- Tidal Period
- Tidal Zone
- Tide
- Till
- Till Plain
- Time
- TIROS (Television And Infrared Observation Satellite)
- Tissue
- Tolerance Model Of Succession
- Tolerance Range
- Tombolo
- Topographic Map
- Topographic Profile
- Topography
- Topset Bed
- Tornado
- Tornado Alley
- Tornado Warning
- Tornado Watch
- Total Column Ozone
- Traction
- Trade Winds
- Transform Fault
- Transparency
- Transpiration
- Transport
- Tree
- Triassic
- Tributary
- Trophic Level
- Tropic Of Cancer
- Tropic Of Capricorn
- Tropical Cyclone
- Tropical Depression
- Tropical Disturbance
- Tropical Rainforest
- Tropical Savanna
- Tropical Storm
- Tropopause
- Troposphere
- Trough
- True North
- True South
- Tsunami
- Tundra
- Turbulent Flow
- Two-Tailed Statistical Test
- Typhoon
U
- Ultisols
- Ultramafic
- Ultraviolet Radiation
- Unconfined Aquifer
- Unconfined Groundwater
- Unconformity
- Undercut Bank
- Uniformitarianism
- United States Natural Resources Conservation Service Soil Classification System
- Universal Time (UT)
- Universal Transverse Mercator (UTM) Grid System
- Universe
- Unloading
- Unstable Atmosphere
- Unstable Equilibrium
- Updraft
- Upper Air Westerlies
- Upper Mantle
- Upslope Fog
- Upwelling
- Urban Area
- Urban Heat Island
- Urbanization
V
- Vacuum
- Valley
- Valley Breeze
- Valley Fog
- Valley Train
- Valley Wall
- Vapor Pressure
- Variance
- Varve
- Vascular Plant
- Velocity
- Ventifact
- Venturi
- Vernal Equinox
- Vertebrate
- Vertical Aerial Photograph
- Vertisols
- Virus
- Viscosity
- Volatile Organic Compounds (VOCs)
- Volcanic Ash
- Volcanic Neck
- Volcanic Pipe
- Volcanic Vent
- Volcano
- Volume
- Vortex
W
- Warm Desert
- Warm Front
- Wash
- Water Consumption
- Water Table
- Water Withdrawal
- Waterfall
- Watershed
- Waterspout
- Watt
- Wave
- Wave Crest
- Wave Cyclone
- Wave Height
- Wave Period
- Wave Refraction
- Wave Trough
- Wave-Cut Notch
- Wave-Cut Platform
- Wavelength
- Weather
- Weather Map
- Weathering
- Weathering Landform
- Westerlies
- Wet-Bulb Depression
- Wet-Bulb Thermometer
- Wetland
- Wetting And Drying
- Wien's Law
- Wilting Point
- Wind
- Wind Ripples
- Wind Vane
- Windward
- Winter
- Winter Solstice