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 process of erosion in which wind carries off particles of dust and sand.






2. A giant structure that contains hundreds of billions of stars.






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






4. 1. A low & bowl-shaped area of land surrounded by higher lands. 2. any large depression in which sediments are deposited.






5. Iron & aluminum & magnesium & manganese & and titanium. Ores of the abundant metals only need to be 3 - 5 times as metal-rich as average rock.






6. A floating ice sheet extending across water from a land-based glacier.






7. The portion of the continental margin that lies between the abyssal plain and the continental slope. The continental rise is underlain by crustal rocks of the ocean basin.






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






9. The very slow & generally continuous downslope movement of soil and debris under the influence of gravity.






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






11. 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.






12. A floating ice sheet extending across water from a land-based glacier.






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






14. 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.






15. Heat extracted from the Earth for use as an power source.






16. 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.






17. A substance that produces negatively charged hydroxide ions ( OH- ) in water and reacts with acids to form salts.






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






19. 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.






20. The partial or complete blocking from view of one object by another.






21. 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.






22. The theory that states that the present-day continents are the fragmented pieces of preexisting larger landmasses called supercontinents.






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






24. A molecule composed of three atoms of oxygen and mostly found in the stratosphere. Though beneficial in the upper atmosphere & at ground level & ozone is called photochemical smog & and is a respiratory irritant and considered a pollutant.






25. A vent in the surface of the Earth & from which lava & ash & and gases erupt.






26. A division of geologic time next smaller than the eon and larger than a period. Example: The Paleozoic era is in the Phanerozoic eon and includes & among others & the Devonian period.






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






28. The relationship between distances in the area being mapped and distances in the map itself.






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






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






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






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






33. A rigid segment of the Earth's lithosphere that moves horizontally and adjoins other plates along zones of seismic activity. Plates may include portions of both continents and ocean basins.






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






35. The very slow & generally continuous downslope movement of soil and debris under the influence of gravity.






36. A Hawaiian term for a basaltic lava flow with a smooth & or ropy surface.






37. The low spot between two successive waves.






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






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






40. The Earth's crust underlying the ocean basins which is formed at mid-oceanic ridges. It is typically 5 to 10 kilometers thick composed of basalt.






41. A wall built out from the shore & usually at perpendicular to it to trap sand carried by longshore currents .






42. The zones of seismic activity long which plates are in contact.






43. A planetary satellite.






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






45. Gases (primarily water and carbon dioxide & but also a variety of sulfur and nitrogen compounds and gaseous hydrocarbons) that trap the Sun's heat in the atmosphere.






46. (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.






47. A volcano that is composed of alternating layers of lava and pyroclastic material & along with abundant dikes and sills. Viscous & intermediate lava may flow from a central vent. Example: Mt. Fuji in Japan.






48. The tectonic region in which two plates meet.






49. A vent in the surface of the Earth & from which lava & ash & and gases erupt.






50. The study of earthquakes & and of the structure of the Earth by both natural and artificially generated seismic waves.