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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. 1. A steep-walled & usually conical depression at the summit or on the flanks of a volcano & resulting from the explosive ejection of material from a vent. 2. A bowl-shaped depression with a raised & overturned rim produced by the impact of a meteori






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






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






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






5. Uranus is named after the Roman god of the sky. It is the seventh planet from the Sun.






6. Sediment formed by chemical precipitation from water. Example: halite precipitated as the result of the evaporation of sea water.






7. The two days of the year on which neither hemisphere is tilted toward or away from the sun.






8. The breaking away of ice from the front of the glacier when it ends in a lake or an ocean. Produces icebergs.






9. A lake in an abandoned meander.






10. The theory of Plate Tectonics states that the Earth's crust is fragmented into a dozen or more large and small pieces floating on a semi-molten mantle.






11. Deposits of wind-borne dust.






12. A community of plants and/or animals and its physical environment & regarded as a unit.






13. An aggregate of one or more minerals in varying proportions.






14. Lacking in rainfall & very dry.






15. Bent rock strata.






16. The outermost layer of the Earth & varying in thickness from about 10 kilometers (6 miles) below the oceans & to 65 kilometers (about 40 miles) below the continents; represents less than 1 percent of the Earth's volume.






17. A protective wall built offshore and usually parallel to the shore.






18. A small & dust-bearing whirlwind.






19. A continuous well-defined mass of material of sufficient ore content to make extraction economically feasible. compare mineral deposit.






20. A ridge of high water associated with a hurricane and which floods over the shore .






21. A broad & mound-like mass of glacier ice that usually spreads radially outward from a central zone.






22. Any natural concentration of a valuable material in the Earth's crust & whether that material can be extracted profitably or not.






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






24. Living in water.






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






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






27. The processes of weathering by which physical actions such as frost wedging break down a rock into fragments & involving no chemical change.






28. Any object that revolves around another object in space.






29. 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.






30. The processes (mechanical and chemical) responsible for the wearing away & loosening & and dissolving of materials of the Earth's crust.






31. The theory of Plate Tectonics states that the Earth's crust is fragmented into a dozen or more large and small pieces floating on a semi-molten mantle.






32. A collection of maps.






33. A mass of ice & formed by the recrystallization of snow & that flows forward & or has flowed at some time in the past.






34. An isolated & steep-sided & rocky mass or island just offshore from a rocky headland & usually on a shore platform.






35. A segment of an active fault zone that has not experienced a major earthquake during a time period when most other segments of the zone have. They are generally regarded as having a higher potential for future earthquakes.






36. A measure of the strength of an earthquake based on the amount of movement recorded by a seismograph . compare Richter scale.






37. Surficial mining & in which the valuable rock is exposed by removal of overlying rock or soil.






38. Any form of water & such as rain & sleet & or snow & that falls to Earth's surface.






39. Glacial drift composed of rock fragments that range from clay to boulder size and randomly arranged without bedding.






40. An artificial hill formed by the debris of successive human settlements.






41. A unit of length used in sea navigation based on the length of 1 minute of arc on a great circle. On Earth & 1 minute of latitude.






42. Flat land covered with tall grass and wildflowers.






43. An era of time during the Phanerozoic eon lasting from 245 million years ago to 66.4 million ago.






44. A division of geologic time next shorter than a period. Example: the Pleistocene epoch is in the Quaternary period.






45. A stone or boulder & glacially transported from place of origin and left in an area of different bedrock composition.






46. That portion of the Earth below the crust and reaching to about 2 &780 km & where a transition zone of about 100 km thickness separates it from the core.






47. An eruption of lava that takes place from a fracture & usually without producing a cone.






48. The process by which a binding & or cementing & agent is precipitated in spaces among individual particles of a deposit. Common cementing agents are calcite & quartz & and dolomite.






49. A disease-causing organism or entity & such as a bacterium or virus.






50. 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.







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