Test your basic knowledge |

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






2. A person who makes maps.






3. Banks of sand and silt along stream bank built by deposition in small increments during successive floods.






4. Imaginary lines on a map or globe that measure distance in degrees north or south of the equator. Latitude lines extend horizontally & from east to west on a globe.






5. Destruction of the ozone layer caused by the release of CFC's (chlorofluorocarbons) into the atmosphere which react chemically with ozone and break it down into different gases.






6. A spring whose temperature is 6.5o C or more above mean annual air temperature.






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






8. The process by which an unconsolidated deposit of sediments is converted in to solid rock.






9. An abandoned meander .






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






11. An instrument that merely indicates the occurrence of an earthquake.






12. Elongated rises on the ocean floor where basalt periodically erupts & forming new oceanic crust.






13. The two days of the year on which the noon sun is directly overhead at either 23.5






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






15. Large area of extremely flat ocean floor lying near a continent and generally over 4 km in depth.






16. To wash or scrub away.






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






18. A natural depression in the surface of the land caused by the collapse of the roof of a cavern or subterranean passage & generally occurring in limestone regions.






19. An area subject to dust storms & especially south central United States .






20. A sedimentary rock composed primarily of biogenic sediments.






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






22. Mars is named after the Roman god of war. It is the fourth planet from the Sun.






23. 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.






24. A sea wave produced by any large-scale & short duration disturbance on the seafloor & commonly a shallow submarine earthquake but possibly also a submarine slide or volcanic eruption.






25. The rigid outer shell of the Earth. It includes the crust and uppermost mantle and is on the order of 100 km in thickness.






26. A Hawaiian term for a lava flow that has a rough & jagged surface.






27. An individual grain or constituent of a rock.






28. Distance over which wave-forming winds blow.






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






30. Rock formed from the accumulation of sediment & Which may consist of fragments and mineral grains of varying sizes from pre-existing rocks & remains or products of animals and plants & the products of chemical action & or mixtures of these.






31. 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.






32. 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






33. Glacial deposits laid down directly by glaciers or laid down in lakes & ocean & or streams as result of glacial activity.






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






35. 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






36. 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.






37. Refers to rock or sediments made up primarily of broken fragments of pre-existing rocks or minerals.






38. A glaciated valley now flooded by the sea.






39. 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






40. A tool for measuring the relative clarity of water.






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






42. A hot & gaseous & self-luminous celestial body & as the Sun.






43. A small ice sheet.






44. The peak flow of water that tops the banks of a stream channel.






45. 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.






46. A coral reef separated from the mainland by a lagoon.






47. No identifiable layers of minerals in a rock sample






48. The generally dark & more or less stable part of the organic matter in a soil & so well decomposed that the original sources cannot be identified.






49. An abandoned meander .






50. The method of locating an epicenter by determining how far it lies from three widely separated seismographs.