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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. A building that contains one or more telescopes.






2. An instrument that detects & magnifies & and records vibrations of the Earth & especially earthquakes.






3. A reverse fault on which the dip angle of the fault plane is 15 degrees or less.






4. Water that flows across watersheds during and immediately after severe rainstorms. In populated areas & stormwater runoff is often water that cannot be handled by existing sewer systems. Stormwater runoff is the leading source of water pollution in t






5. To change back and forth uncertainly.






6. Produced as a wave steepens and falls forward as the wave nears the shore.






7. The perpendicular or very steep descent of a stream.






8. The environment where a particular plant or animal is normally found.






9. Objects revolving around the sun that are too small and too numerous to be considered planets.






10. A type of disintegration in which jointed rock is forced apart by the expansion of water as it freezes in fractures.






11. A region of high heat flow on the Earth's surface & thought to lie above a mantle plume .






12. The innermost zone of Earth. It consists of two parts & an outer liquid section and an inner solid section & both chiefly of iron and nickel with about 10 percent lighter elements. It is surrounded by the mantle.






13. A commonly used scale of earthquake intensity.






14. A lake of lava & usually basaltic & in a volcanic caldera.






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






16. A cyclical pattern of movement in a fluid body such as the ocean & the atmosphere & or the Earth's mantle & driven by density variations which in turn are the result of differences in temperature from one part of the fluid to another.






17. A sedimentary rock made up of chemical sediments. Example: rock salt.






18. The sum of the processes that result in the wearing away or the progressive lowering of the Earth's surface by weathering & erosion & mass wasting & and transportation.






19. The geologic eon lying between the Archean and Phanerozoic eons & beginning about 2.5 billion years ago and ending about 0.57 billion years ago.






20. A mudflow composed chiefly of pyroclastic material on the flanks of a volcano.






21. A broad & deep & generally straight furrow carved in bed rock by the abrasive action of debris embedded in a moving glacier. Larger and deeper than a glacial striation.






22. The line formed by the intersection of the axial plane of a fold with a bedding plane & marking where the bed shows its maximum curvature.






23. Either the northern or southern half of the Earth as divided by the equator & or the eastern or western half as divided by a meridian.






24. Of or relating to or containing basalt & a dark & dense & extrusive rock that has a silica content of 40% to 50% and makes up most of the ocean floor.






25. The part of the crust that directly underlies the continents and continental shelves. Averages about 35 km in thickness & but may be over 70 km thick under largest mountain ranges.






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






27. An ingredient in a food or other substance that nourishes or promotes growth.






28. The resistance of a mineral to scratching & as measured by the Mohs scale.






29. A detailed mathematical description of the cause-and-effect relationships between events that can be used to predict or explain other such events.






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






31. Any solid material that has settled out of a state of suspension in liquid.






32. The weak or 'soft' zone in the upper mantle just below the lithosphere & involved in plate movement and isostatic adjustments. It lies 70 to 100 km below the surface and may extend to a depth of 400 km.






33. The line formed by the intersection of the axial plane of a fold with a bedding plane & marking where the bed shows its maximum curvature.






34. Any molten material that is extrusive or volcanic & or the rock that forms from a molten extrusive. Molten rock that flows at the Earth's surface.






35. 1. A mass of sand & gravel & or alluvium deposited on the bed of a stream & sea & or lake & or at the mouth of a stream 2. A unit of pressure & approximately equal to atmospheric pressure at sea level.






36. A permeable region of rock or soil through which ground water can move.






37. That portion of the resources for a valuable mineral commodity that can be extracted from the Earth at a profit today.






38. A cavity in a lava & formed by the entrapment of a gas bubble during solidification of the lava.






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






40. The persistence of wind-formed waves after wind ceases.






41. 1. Breach in a natural levee . 2. Deep crevice or open fracture in glacier ice.






42. The galaxy where Earth is located.






43. A blanket of wind-driven sand with an upper surface about a meter above ground level.






44. A group of stars that appear to make a pattern in the sky. The Big Dipper is a constellation.






45. An imaginary circle around the earth that represents the halfway mark between the North and South Poles and establishes the boundary between the Northern and Southern Hemispheres.






46. The prediction that climate will warm as a result of the addition to the atmosphere of humanly produced greenhouse gases.






47. Verifying assessments made from satellite data by doing direct & 'on-the ground' measurements.






48. 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.






49. The point on the Earth's surface where a magnetic needle points vertically downward (north magnetic pole) or vertically upward (south magnetic pole).






50. A pillar formed as a stalactite and stalagmite meet.






Can you answer 50 questions in 15 minutes?



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