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 method of sediment transport in which the turbulence of a fluid is able to keep particles supported in the fluid.






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






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






4. Shapes & like mountains or hills that make up the Earth's surface.






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






6. To preserve & or to avoid wasteful use.






7. The rise and fall of sea level caused by the gravitational pull of the Sun and Moon on the Earth.






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






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






10. A period of dryness & that when prolonged & causes damage to crops; a shortage of water.






11. Geologic time expressed in years before the present.






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






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






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






15. The process by which ocean floors spread laterally from crests of main ocean ridges. As material moves laterally from the ridge & new material replaces it along the ridge crest by welling upward from the mantle.






16. 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.






17. Deposition of fine mineral particles (silt) on the beds of streams or lakes.






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






19. A large area of flat or nearly flat land.






20. The physical & chemical & and biological processes by which rock at or near the Earth's surface is broken down into smaller pieces.






21. 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.






22. Flat land covered with tall grass and wildflowers.






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






24. 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.






25. The pattern of water circulation from the ocean to the atmosphere to the land and back to the ocean.






26. The color of a mineral in its powdered form obtained from scraping a sample on a ceramic plate






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






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






29. A volcano in the shape of a flattened cone & broad and low & built by very fluid flows of basaltic lava.






30. The top of a wave.






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






32. Reduction of pore space between individual particles as the result of overlying sediments or of tectonic movements.






33. The production of living matter by organisms that make food using sunlight or chemicals. Usually expressed as grams of carbon per square meter per year.






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






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






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






37. Named after the Roman god of the sea. It is the eighth planet from the Sun.






38. The arrangement of rock units in the proper chronological order from youngest to oldest.






39. A thickened elevated region of Earth's crust that is mainly (but not entirely) above sea level.






40. The region of a shore that is covered at high tide and exposed at low tide.






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






42. 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






43. A flood that rises and falls very rapidly.






44. Deposits of wind-borne dust.






45. Bent rock strata.






46. The effect of water and carbon dioxide absorbing outgoing infrared radiation & raising a system's temperature. The term is generally used with reference to the Earth's temperature & although it can also be applied to other systems & such as greenhous






47. Any seismic wave that travels through the body of Earth & rather than along its surface.






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






49. 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.






50. 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.