Presentation on theme: "SOL Exam Questions on Oceanography & Fresh Water"— Presentation transcript:
1SOL Exam Questions on Oceanography & Fresh Water Tangier Island in the Chesapeake Bay, Dagenhart, 2004.Thomas V. Dagenhart, M.S.v 4.2
2As the water cycle progresses, what happens after evaporation to cause clouds to form? river runoffprecipitationocean currents move awaycondensation1998a
3Which of these can cause the water table in an aquifer to rise? existing wells being pumpedfew wells being drilledprecipitationnatural springs1998b
4Infiltration if Permeable Porosity is the amount of pore space in soils. Permeability is the ability of water to pass through the soil. Why do some soils have high porosity but low permeability?Pores with airSome soils have large pores that do not lead anywhere but simply hold groundwater.Sandy soils dry out quickly, and the pore space fills with air which blocks the downward flow of water.Some soils have a large volume of pore space, but the individual pores are too small to allow water to pass through.Water with dissolved iron cannot pass through the magnetic field of soils that are rich in magnetite.Infiltration if PermeablePores with water2000
5Which of the following can result when underground water is heated by hot igneous rock? metamorphismgeyserssalt domeskarst topography2000
6The surface of the sea is not level due to all of the following except - currentstidessalinitywinds2000
7The accumulated salts in seawater make the seawater much more dense than fresh water. One of the characteristics of seawater is that it has -higher levels of dissolved oxygen than fresh watera lower freezing point than fresh waterdecreased buoyancy for swimmersninety elements that are easily extracted from seawaterHalite or Sodium Chloride2000
8Which of the following would have the greatest salinity? ArcticAtlanticMediterraneanPacificmuch river inflowlittle river inflow2000
9Many species of the order Cetacea (whales, dolphins, and porpoises) have become so scarce that they are now protected under international law. Which of the following probably did not contribute to the decline in these populations?whaling industryfishing netsocean pollutiongreenhouse effectHumpback Whale Song2000
10London and Irkutsk are located at approxi-mately the same latitude London and Irkutsk are located at approxi-mately the same latitude. What would help explain why London experiences a more moderate range of temperatures than does Irkutsk?2000A large lake keeps Irkutsk cool.Irkutsk has fewer trees than London has.High mountains near London block cold winds.Warm ocean currents influence London’s climate.
11As landmasses drifted over the Earth from 180 million years ago to the present day, one significant change that occurred was the -increase in overall landmass sizedecrease in number of transverse faultsincrease in number of trenchesdecrease in number of mid-ocean ridges2000
12Oxygen must be dissolved in ocean water in order to sustain animal life. Using the above table as a guide, which human activity should be regulated because of the difficulty it causes for sea creatures to breathe?piping heated waste water into the oceanexcessive motorboat trafficgrowing seaweed as a food sourceScuba diving around coral reefs2000
13Tidal Power Plant, Bay of Fundy All of the following are sources of energy derived from the ocean exceptTidal Power Plant, Bay of FundyA. coalB. thermalC. tidesD. waves2001
142001 Basalt Clay Limestone Sandstone Scientists use drill core samples to study the underlying rock structure. These two core samples were obtained from the ocean floor from locations separated by 10 km. Which layer in core sample one does not have a matching layer in core sample two?BasaltClayLimestoneSandstone2001
15The wireless operator aboard the Titanic signaled for help and gave the ship’s location as 41o45’N and 50o14’W. Which area shown on the map is most likely where the Titanic struck the iceberg?ABCD2001
16X 10% in Greenland 2001 High mountain peaks Permanent Arctic blizzards Only 3% of the Earth’s water is fresh water. The world’s oceans contain the rest of the Earth’s water. Of that 3%, three-fourths is tied up in glaciers, ice caps, and snowfields. Antarctic glaciers contain nearly 85% of all the ice in the world, and floating sea ice in the Arctic contains 10% of the ice. Sea ice freezes from ocean water, but the salt is excluded in the freezing process, resulting in mostly freshwater ice. Where is the remaining 5% of the world’s permanent supply of ice and snow?XHigh mountain peaksPermanent Arctic blizzardsFloating icebergsDrifting Antarctic snow10% in Greenland2001
17Oil spills have a tremendous impact on the ocean environment, and the oil must be cleaned up after these spills. A new technique for cleaning oil from beaches is called bioremediation. This technique uses naturally occurring bacteria to break down the oil. How is this accomplished?The bacteria bind with the oil and bring it to land.The bacteria pull the oil down to the ocean floor.The bacteria chemically change the oil into less harmful substances.The bacteria die and absorb the oil.2001
18Sinkholes associated with natural processes are characteristic of what type of bedrock? LimestoneGraniteBasaltGneissSinkholes also form over dolostone, rock gypsum & rock salt.Sinkhole in Winter Park, FL2001
19This picture shows a simple well that was dug down to the groundwater This picture shows a simple well that was dug down to the groundwater. What probably caused the lower level of groundwater, known as a “cone of depression,” in the vicinity of the well?The weight of the atmosphere presses down on the groundwater in the well.The ground below the well acts as a vacuum sucking out the water.Gravity pulls down the water beneath the well.As water is drawn from the well, it takes time for the groundwater to percolate through the soil and restore the level.2001
20Density Units: g/mL or g/cm3 A boat will float higher in the Atlantic Ocean than it will in the Potomac River because ocean water has -a lower freezing pointmore organisms in itmore oxygen in ita greater densityDensity = Mass / VolumeDensity Units: g/mL or g/cm3What makes seawater density go higher?Higher SalinityLower Temperatures2001
2120034. The picture above shows a hydrometer in water. The same hydrometer was placed in the liquids below. Which liquid is denser than water?A B. C D.
229. The drawing above shows. the water table in the vicinity 9. The drawing above shows the water table in the vicinity of a newly drilled well. Which of the drawings below shows the appearance of the water table several months later when the well has been in regular use?2003This down warp in the water table is called a cone of depression.
2315. The Marianas Trench in the Pacific Ocean is 36,160 feet below sea level. This deep oceanic trench is caused by -A. swift ocean currents eroding away the ocean floorB. the collapse of an empty magma chamber in a large volcanoC. excessive boat traffic disrupting the normal sedimentation processD. two tectonic plates colliding and one plunging below the other2003
24Trenches of the World Ocean Deepest parts of ocean, created by oceanic lithosphere subducting under less dense lithosphere.Mostly in Pacific Ocean around “Ring of Fire”.? \Garrison (2005)
25Comparison of Mariana Trench to Mt. Everest HingeSteeper slope on slab not subducting, i.e. the volcano side.Garrison (2005)Bathymetric profile of trench without vertical exaggeration.
26Angle of Trench Walls & Subduction Angle Depend on Crustal Age Older crust is denser & subducts at a steeper angle.Top picture is similar to western Pacific trenches.Bottom picture is similar to subduction near WA & OR, i.e. Cascadia Subduction Zone.Tarbuck & Lutgens (2005)
2726. If the polar ice caps were to melt, all of the following would occur except - 2003A. increased coastal floodingB. increased sea levelC. decreased ocean salinityD. decreased tidal actionAtlantic Ocean eroding a rocky shoreline, Schoodic Peninsula, Acadia N.P., MEDagenhart, 2003
2829. Why does water move more slowly through clay than through humus? A. Clay has greater permeability.B. Clay has very small pore spaces.C. Clay prevents capillary attraction of water.D. Clay reduces evaporation rates.2003
2932. The two most common ions found in ocean water are - A. chloride & sodiumB. potassium & calciumC. phosphate & nitrateD. magnesium & sodium2003Salt Crystal Being Dissolved by Water MoleculesGarrison, 2005
3019. When the sea floor spreads apart, volcanoes and ridges are formed because - sediments are deposited where the floor spreads, building ridgesas the plates pull apart, magma moves to the surface, building ridgesocean water pushes down on the surrounding sea floor, pushing up ridgesunderwater earthquakes lift the sea floor into long ridges2004Pillow lava along Mid-Atlantic Ridge, Alvin’s mechanical arm in foreground, pillow structure indicates lava extrusion underwater.Tarbuck & Lutgens (2005)
31Mid-Ocean Ridge above Sea Level Thingvellir Graben, Iceland; only place where the MOR is exposed above sea level due to hot spot at MOR.Note black basalt rock, absence of pillow lava, & small normal fault block.Garrison (2005)North American PlateEurasian Plate
32Mid-Ocean Ridge Profiles Much vertical exaggeration.Note absence of rift valley & gentler slopes with rapid spreading.Tarbuck & Lutgens (2005)
33Continental shelf Continental slope Abyssal plain Trench 42. At which ocean feature would the greatest amount of water pressure be exerted?Continental shelfContinental slopeAbyssal plainTrench2004
348. In the jar shown, a sample of soil was mixed with water and then allowed to settle for 24 hours. The jar serves as a model for what process?2007Evaporation of water from a muddy pondFormation of soil from parent materialDeposition of sediment in a lake bedErosion of rock particles by waterclayLarger particles settle more quickly; smaller particles settle more slowly. Leads to:Sand & gravel near shoreClay in deep ocean.
359. Which recent geologic processes commonly occur in the Coastal Plain region of Virginia? Crustal uplift and rock deformationRifting and intrusionErosion and depositionSubduction and metamorphismVirginia’s Coastal Plain is typical of trailing edges of continents, AKA passive continental margins.2007
36The Wilson Cycle Named after a Canadian, J.Tuzo Wilson. Supercontinent rifts apart (along normal faults) to form new ocean.Sedimentation occurs along passive continental margin (and on platform?) as ocean widens.Ocean begins closing & continental margins become active (subduction starts): trenches, earthquakes, & volcanoes.Island arcs and sediments caught between colliding continents are deformed and obducted onto continents as continents collide & form a suture zone.After a period, the supercontinent starts to rift apart again & the cycle starts over. Rift may not be in old suture zone.CGU, 2005
37Mountains develop with roots, that’s isostasy! The Wilson CycleBegins with breakup of supercontinent along rift valley (divergent boundary).A new ocean & passive continental margins form.Ocean widens & continental margins buried by sediment.Trenches form, oceanic crust is destroyed, & ocean closes (continental-oceanic convergent boundary).Ends with formation of new supercontinent (continental-continental convergent boundary).Heat + Pressure= MetamorphismMountains develop with roots, that’s isostasy!Garrison, 2005
38Sea Ice on the Arctic Ocean (pancake ice). 10. Dramatic variations in the polar ice caps most likely suggest changes in —the Moon’s orbitEarth’s climateebb and flow of tidesglobal water consumption2007Earth’s ice caps include glaciers resting on Antarctica & sea ice floating in the Arctic Ocean.Sea Ice on the Arctic Ocean (pancake ice).Gross & Gross, 1996
39Loss of Arctic Sea Ice,Is the change really linear or speeding up?Defense records contain more data; we need ability to surface a nuclear sub near the N. Pole & fire Russia.The thickness is also dropping quickly even where the area is still covered!Tarbuck & Lutgens, 2008
40Icebergs Forming from Outlet Glacier On West Coast of Greenland U.S. Coast Guard, 2006
41Castellated (Non-Tabular) Iceberg Off Newfoundland May run aground near shore.U.S. Coast Guard, 2006
42Castellated (Non-Tabular) Iceberg Note mass hidden underwater, = ~90% of mass.U.S. Coast Guard, 2006
43Tabular Iceberg Off Antarctica May move North to 40o S in Atlantic and 50o S in Pacific.Increased production associated with loss of ice shelves due to global warming.U.S. Coast Guard, 2006
4415. Which of these provides the best estimate of how long it took a thick layer of sedimentary rock to form?Using a microscope to closely examine the size of particles that make up the rock layerMaking a model that creates a sedimentary rock layer at a constant rateCalculating the age of the top and bottom of the layerMeasuring the rate at which similar layers of sediments collect2007Ash layers between silt & clay layers in the Painted Desert allow absolute-age dating of sediments in between.Dagenhart, 2003
4523. Seawater is typically denser than freshwater due to seawater’s — higher salinitylower freezing pointsmaller massgreater depth2007Atlantic Ocean water at the harbor entrance of Nassau, Bahamas.Note color variation.Dagenhart, 2004
4627. Which of these describes the most common way that material is added to a continental shelf? Evaporation from continental watershedsDeposition of continental sedimentsEruption of continental volcanoesSubduction of continental plates2007
47Passive Continental Margins Typical of East coast of U.S.Most of Atlantic Ocean margins are passive.Broad continental shelf & continental rise.No trenches, no volcanoes, few earthquakes.Note numerous normal fault blocks beneath sediment mantle, sites for oil exploration.Tarbuck & Lutgens (2005)Uppermost Mantle
48Active Continental Margins Typical of U.S. West Coast & Pacific “Ring of Fire”.Narrow continental shelf built from accretionary wedge.Shelf often uplifted by tectonic forces to reveal wave-cut platforms.Common Features: trenches, volcanoes, earthquakes, young mountains.Tarbuck & Lutgens (2005)
49Triassic Paleozoic Precambrian Mesozoic 31. Rocks found on land are up to 3.8 billion years old, but those in the ocean are no more than 180 million years old. Using the information shown, during which era could parts of the ocean floor have formed?4.0Geologic Time Scale2007TriassicPaleozoicPrecambrianMesozoic
50Sea Floor AgeThurman (2004)Pattern results from sea floor spreading along mid-ocean ridges & offsets along transform faults.No sea floor basalt older than 180 m.y.
51Tides Seasons Prevailing winds Magnetic poles 32. Which of these are caused primarily by the gravitational force between Earth and the Moon?2007TidesSeasonsPrevailing windsMagnetic polesMussels, snails, & barnacles exposed during low tide at Acadia N.P., ME;Dagenhart, 2003
52The Phases of the MoonThurman, 2004All phases seen during a day synodic month.Only during a full or new moon do the tidal bulges of the moon & sun work ~together.
53Combined Effects of Moon & Sun Moon & sun work together.Moon & sun work against each other.Thurman, 2004
54surface runoff ground water transpiration precipitation 39. Most water leaves the ocean through evaporation and returns to the ocean through —surface runoffground watertranspirationprecipitation2007?Shenandoah River near Front Royal flooding after Hurricane Isabel, September, Dagenhart, 2003
55The Water CycleWhat energy source powers the water cycle?
5640. Rivers, springs, and aquifers are all - frozen in winterhuman-made structureslocated above groundsources of fresh water2007Spring emerging from Arizona cliff.Tarbuck & Lutgens, 2005
57Pores filled with water Tarbuck & Lutgens, 2005InfiltrationGroundwater TermsPores filled with airPores filled with waterInfiltration replaces (recharges) groundwater.
5848. The three wells shown provide water for a growing city 48. The three wells shown provide water for a growing city. What is the most likely effect on the system if six new wells are brought into production as the population increases?The limestone layer will collapse.The shale layer will shrink.The aquifer will increase in volume.The water table will drop.2007
59drawdown = vertical drop Cone Of DepressionForms best around heavily pumped wells.Changes local hydraulic gradient.Lowers water table and makes some wells go dry.Tarbuck & Lutgens, 2005drawdown = vertical drop
60All SOL questions copyrighted by Virginia’s Dept. of Education. References1997 = Virginia’s 1997 Earth Science SOL Sample Questions.1998 a&b = Virginia’s 1998 Earth Science SOL Sample Questions.2000 = Virginia’s 2000 Earth Science SOL Test.2001 = Virginia’s 2001 Earth Science SOL Test.2002 = Virginia’s 2002 Earth Science SOL Test.2003 = Virginia’s 2003 Earth Science SOL Test.2004 = Virginia’s 2004 Earth Science SOL Test.2005 = Virginia’s 2005 Earth Science SOL Test.2007 = Virginia’s 2007 Earth Science SOL Test.Garrison, T. (2005) Oceanography: An Invitation to Marine Science, 5th ed. Brooks/Cole Thomson Learning, Stamford, CT, 522 p.Gross, M.G. and E. Gross (1996) Oceanography: A View of the Earth, 7th ed. Prentice Hall, Upper Saddle River, NJ, 472 p. Levin, H.L. (2003) The Earth Through Time, 7th ed. John Wiley & Sons, Inc., Hoboken, NJ, 563+ p.Tarbuck, E.J. and F.K. Lutgens (2005) Earth: An Introduction to Physical Geology, 8th ed. Pearson-Prentice Hall, Upper Saddle River, NJ, 711 p.All SOL questions copyrighted by Virginia’s Dept. of Education.