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Earth Science

Subject : science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. The study of earthquakes & and of the structure of the Earth by both natural and artificially generated seismic waves.






2. A measure of the size of an earthquake in terms of the damage it causes.






3. The vertical distance between the crest and adjacent trough of a wave.






4. An accumulation of wind driven sand into a distinctive shape.






5. A valley caused by extension of the Earth's crust. Its floor forms as a portion of the crust moves downward along normal faults.






6. A waterway from open ocean into a lagoon.






7. The line that separates one drainage basin from another.






8. The line that separates one drainage basin from another.






9. A mound or ridge of sediment deposited by a glacier.






10. The formation & advance and retreat of glaciers and the results of these activities.






11. A mound or ridge of sediment deposited by a glacier.






12. Pertaining to clastic material formed by volcanic explosion or aerial expulsion from a volcanic vent.






13. Molten rock & containing dissolved gases and suspended solid particles. At the Earth's surface & magma is known as lava.






14. A fracture or zone of fractures along the boundaries of tectonic plates where movement has taken place.






15. Gases that can be dissociated by solar radiation & which releases chlorine & which in turn destroys ozone.

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16. A study designed to collect critical data to be used for comparison or as a control in a later study.






17. Swamp that forms in the low lying flood plain behind a levee.






18. That part of the continental margin that lies between the continental shelf and the continental rise. Slope relatively steep & 3o - 6o. The continental slope is underlain by crustal rocks of the continent.






19. A conical volcano formed by the accumulation of pyroclastic debris around a vent.






20. The upper horizons in a soil & through which gravitational moisture travels & removing soluble decomposition products.






21. An area where fresh water comes into contact with seawater & usually in a partly enclosed coastal body of water; a mix of fresh and salt water where the current of a stream meets the tides.






22. (Greek-Aphrodite)named after the Roman goddess of love. It is the planet closest in size to Earth and the second planted from the Sun.






23. A waste material that contaminates air & water & or soil.






24. The portion of the continental margin that extends as a gently sloping surface from the shoreline seaward to a marked change in slope at the top of the continental slope . Seaward depth averages about 130 m.






25. The straightening and/or deepening of a river channel.






26. The zone below the zone of aeration in which all pore spaces are filled with water.






27. Jupiter is named after the Roman king of the gods. It is the fifth planet from the Sun.






28. The chronological sequence of units of Earth time.






29. A system that uses a constellation of 24 satellites & their ground stations & and individual GPS receivers to accurately locate points on Earth.






30. The process of mountain building.






31. The initial point within the Earth that ruptures in an earthquake & directly below the epicenter. The point within the Earth which is the center of an earthquake & at which strain energy is first released and converted to elastic wave energy.






32. The chronological sequence of units of Earth time.






33. The transformation of a soil from a solid to a liquid state as the result of increased pore pressure.






34. The symbol used on a map to indicate directions & both cardinal and ordinal.






35. The current geologic era & which began 66.4 million years ago and continues to the present.






36. Temporary accumulations of sediments that collect between low and high water marks.






37. The outermost part of the core. It is liquid & about 1 &700 km thick & and separated from the inner & solid core by a transition zone about 565 km thick.






38. All of space and everything in it.






39. A system involving continuous interaction of the solid Earth & the atmosphere & the oceans and living things.






40. A naturally occurring inorganic solid that has a well-defined chemical composition and in which atoms are arranged in an ordered fashion.






41. The direction & north (normal) or south (reversed) & that a magnetic compass needle points.






42. The acidity in rain due to gases from internal combustion engines and coal- and oil-burning power plants.






43. A downward distortion or dimple in the water table that forms as a well pumps water faster than it can flow through the aquifer.






44. The point on the Earth's surface that is directly above the focus of an earthquake.






45. A large ridge or mound-like structure within a body of water that is built by calcareous organisms such as corals & red algae & and bivalves.






46. The line separating land and water.






47. Any accumulation of material & by settling from water or air & chemical precipitation & evaporation from solution & etc.






48. A landscape that develops from the action of ground water in areas of easily soluble rocks. It is usually characterized by caves & underground drainage and sinkholes.






49. Deep steep-sided depression in the ocean floor caused by the subduction of oceanic crust beneath either other oceanic crust or continental crust.






50. A sedimentary rock composed primarily of biogenic sediments.







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