Nature and environment

(geology) an increase in land resulting from alluvial deposits or waterborne sediment

(meteorology) the horizontal transfer of heat or other atmospheric properties

(meteorology) winds spiraling outward from a high pressure center; circling clockwise in the Northern Hemisphere and counterclockwise in the sou…

(meteorology) a unit of pressure equal to a million dynes per square centimeter; "unfortunately some writers have used bar for one dyne per squa…

(geology) a stratum of rock (especially sedimentary rock); "they found a bed of sandstone"

(geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other; "they built it right over a geolog…

(meteorology) altitude of the lowest layer of clouds

(geology) a constituent fragment of a clastic rock

(geology) a rock composed of broken pieces of older rocks

meteorology of climates and their phenomena

the preservation and careful management of the environment and of natural resources

(meteorology) the vertical movement of heat or other properties by massive motion within the atmosphere

(meteorology) rapid inward circulation of air masses about a low pressure center; circling counterclockwise in the Northern Hemisphere and clock…

(geology) the erosion of soil as a consequence of sand and dust and loose rocks being removed by the wind; "a constant deflation of the desert l…

(geology) the mechanical process of wearing or grinding something down (as by particles washing over it), also figuratively

(oceanography) a warm ocean current that flows along the equator from the date line and south off the coast of Ecuador at Christmas time

(geology) the mechanical process of wearing or grinding something down (as by particles washing over it), also figuratively

(geology) the mechanical process of wearing or grinding something down (as by particles washing over it), also figuratively

(geology) a long winding ridge of post glacial gravel and other sediment; deposited by meltwater from glaciers or ice sheets

(geology) the probability that an earthquake will generate a level of ground motion that exceeds a specified reference level during a given expo…

(geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other; "they built it right over a geolog…

(geology) line determined by the intersection of a geological fault and the earth's surface

(geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other; "they built it right over a geolog…

(geology) the arrangement of leaflike layers in a rock

(geology) the geological features of the earth

(geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other; "they built it right over a geolog…

(meteorology) the atmospheric phenomenon created at the boundary between two different air masses

(geology) a natural process whereby geological features are modified

(geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other; "they built it right over a geolog…

(geology) the geological features of the earth

(geology) a natural process whereby geological features are modified

a science that deals with the history of the earth as recorded in rocks

(geology) the matrix of fine-grained crystalline material in which larger crystals are embedded

(geology) a horizontal dislocation

(geology) a column of weathered and unusually shaped rock; "a tall sandstone hoodoo"

the branch of geology that studies water on the earth and in the atmosphere: its distribution and uses and conservation

(meteorology)an isogram connecting points having equal barometric pressure at a given time

(geology) a general equilibrium of the forces tending to elevate or depress the earth's crust

(meteorology) an isogram connecting points having the same temperature at a given time

(geology) a hollow (typically filled by a lake) that results from the melting of a mass of ice trapped in glacial deposits

(geology) a hollow (typically filled by a lake) that results from the melting of a mass of ice trapped in glacial deposits

(geology) a mass of fine-grained rock in which fossils, crystals, or gems are embedded

the earth science dealing with phenomena of the atmosphere (especially weather)

(meteorology) a composite front when colder air surrounds a mass of warm air and forces it aloft

(meteorology) a composite front when colder air surrounds a mass of warm air and forces it aloft

the branch of science dealing with physical and biological aspects of the oceans

the branch of science dealing with physical and biological aspects of the oceans

(geology) the principle that in a series of stratified sedimentary rocks the lowest stratum is the oldest

(geology) the leaping movement of sand or soil particles as they are transported in a fluid medium over an uneven surface

(geology) flat elevated land with poor soil and little vegetation that is scarred by dry channels of glacial origin (especially in eastern Washi…

(geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other; "they built it right over a geolog…

(geology) sediment in which flat pebbles are uniformly tilted in the same direction

(geology) a flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock

(geology) the descent of a large mass of earth or rocks or snow etc.

(geology) the principle that in a series of stratified sedimentary rocks the lowest stratum is the oldest

(geology) the deposition of one geological stratum on another

(geology) the principle that in a series of stratified sedimentary rocks the lowest stratum is the oldest

(geology) a rise of land to a higher elevation (as in the process of mountain building)

(geology) a rise of land to a higher elevation (as in the process of mountain building)

(geology) a rise of land to a higher elevation (as in the process of mountain building)

(geology) a rise of land to a higher elevation (as in the process of mountain building)

(geology) the mechanical process of wearing or grinding something down (as by particles washing over it), also figuratively

(geology) the mechanical process of wearing or grinding something down (as by particles washing over it), also figuratively

(meteorology) a map showing the principal meteorological elements at a given time and over an extended region

(meteorology) a map showing the principal meteorological elements at a given time and over an extended region

(geology) a piece of rock of different origin from the igneous rock in which it is embedded

leave someone who needs or counts on you; leave in the lurch; "The mother deserted her children"

establish a forest on previously unforested land; "afforest the mountains"

a slight wind (usually refreshing); "the breeze was cooled by the lake"; "as he waited he could feel the air on his neck"

underground bed or layer yielding ground water for wells and springs etc

extremely cold; "an arctic climate"; "a frigid day"; "gelid waters of the North Atlantic"; "glacial winds"; "icy hands"; "polar weather"

lacking vitality or spirit; lifeless; "a technically perfect but arid performance of the sonata"; "a desiccate romance"; "a prissy and emotionle…

a slide of large masses of snow and ice and mud down a mountain

a bathroom sink that is permanently installed and connected to a water supply and drainpipe; where you can wash your hands and face; "he ran som…

the entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet; "flo…

small Mediterranean evergreen tree with small blackish berries and glossy aromatic leaves used for flavoring in cooking; also used by ancient Gr…

small Mediterranean evergreen tree with small blackish berries and glossy aromatic leaves used for flavoring in cooking; also used by ancient Gr…

small Mediterranean evergreen tree with small blackish berries and glossy aromatic leaves used for flavoring in cooking; also used by ancient Gr…

land on a beach; "the ship beached near the port"

the diversity of plant and animal life in a particular habitat (or in the world as a whole); "a high level of biodiversity is desirable"

cause to slow down or get stuck; "The vote would bog down the house"

cause to slow down or get stuck; "The vote would bog down the house"

a slight wind (usually refreshing); "the breeze was cooled by the lake"; "as he waited he could feel the air on his neck"

a natural stream of water smaller than a river (and often a tributary of a river); "the creek dried up every summer"

a ravine formed by a river in an area with little rainfall

a ravine formed by a river in an area with little rainfall

the entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet; "flo…

the entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet; "flo…

explore natural caves

a linked or connected series of objects; "a chain of daisies"

the contestant you hope to defeat; "he had respect for his rivals"; "he wanted to know what the competition was doing"

a steep high face of rock; "he stood on a high cliff overlooking the town"; "a steep drop"

the weather in some location averaged over some long period of time; "the dank climate of southern Wales"; "plants from a cold clime travel best…

of or relating to a climate; "climatic changes"

of or relating to a climate; "climatic changes"

the weather in some location averaged over some long period of time; "the dank climate of southern Wales"; "plants from a cold clime travel best…

make overcast or cloudy; "Fall weather often overcasts our beaches"

the act of moving smoothly along a surface while remaining in contact with it; "his slide didn't stop until the bottom of the hill"; "the childr…

agreement as to goals; "the preachers and the bootleggers found they had a community of interests"

agreement as to goals; "the preachers and the bootleggers found they had a community of interests"

the contestant you hope to defeat; "he had respect for his rivals"; "he wanted to know what the competition was doing"

the contestant you hope to defeat; "he had respect for his rivals"; "he wanted to know what the competition was doing"

keep in safety and protect from harm, decay, loss, or destruction; "We preserve these archeological findings"; "The old lady could not keep up t…

a person who uses goods or services

the contestant you hope to defeat; "he had respect for his rivals"; "he wanted to know what the competition was doing"

of or relating to or concerning the American colonies during and immediately after the American Revolutionary War; "the Continental Army"; "the…

marine colonial polyp characterized by a calcareous skeleton; masses in a variety of shapes often forming reefs

a reef consisting of coral consolidated into limestone

a purified and potent form of cocaine that is smoked rather than snorted; highly addictive

a purified and potent form of cocaine that is smoked rather than snorted; highly addictive

a natural stream of water smaller than a river (and often a tributary of a river); "the creek dried up every summer"

a steady flow of a fluid (usually from natural causes); "the raft floated downstream on the current"; "he felt a stream of air"; "the hose eject…

confusion characterized by lack of clarity

no longer in existence; "the extinction of a species"

leave someone who needs or counts on you; leave in the lurch; "The mother deserted her children"

lacking vitality or spirit; lifeless; "a technically perfect but arid performance of the sonata"; "a desiccate romance"; "a prissy and emotionle…

lacking vitality or spirit; lifeless; "a technically perfect but arid performance of the sonata"; "a desiccate romance"; "a prissy and emotionle…

leave someone who needs or counts on you; leave in the lurch; "The mother deserted her children"

an unbridgeable disparity (as from a failure of understanding); "he felt a gulf between himself and his former friends"; "there is a vast discon…

an unbridgeable disparity (as from a failure of understanding); "he felt a gulf between himself and his former friends"; "there is a vast discon…