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 waste material that contaminates air & water & or soil.






2. A process by which salts accumulate in soil.






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






4. The line separating land and water.






5. Distance over which wave-forming winds blow.






6. The area immediately below the ground surface within which pore spaces are partially filled with water and partially filled with air.






7. A glaciated valley now flooded by the sea.






8. 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.






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






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






11. A geometrical form taken by a mineral & giving external expression to orderly internal atomic arrangement.






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






13. The precipitation that runs directly off the surface to stream or body of standing water.






14. A large & basin-shaped volcanic depression & more or less circular in form. Typically steep-sided & found at the summit of a shield volcano.






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






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






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






18. Long narrow beaches separated in many places from the mainland by lagoons.






19. 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.






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






21. An area in which a large number of windmills have been erected to generate electrical power.






22. An abandoned meander .






23. The solid innermost part of the core with a diameter of a little over 1 &200 km.






24. A narrow & elongate region in which one lithospheric plate descends relative to another.






25. To wash or scrub away.






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






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






28. The condition of equilibrium & comparable to floating & of units of the lithosphere above the asthenosphere.






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






30. Bent rock strata.






31. A process of land degradation initiated by human activity & particularly in the zones along the margins of deserts.






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






33. 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.






34. The condition of equilibrium & comparable to floating & of units of the lithosphere above the asthenosphere.






35. 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.






36. Applies to igneous rocks that cool on the surface of the Earth & including beneath water; typically with small crystals due to the rapidity of cooling. Synonym of extrusive. Antonym of plutonic.






37. A building that contains one or more telescopes.






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






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






40. A planetary satellite.






41. 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.






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






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






44. The upper horizons in a soil & through which gravitational moisture travels & removing soluble decomposition products.






45. A small ice sheet.






46. The remains of an extremely massive star pulled into a small volume by the force of gravity.






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






48. 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.






49. The southern portion of the late Paleozoic supercontinent known as Pangea. It means & literally 'Land of the Gonds' (a people of the Indian subcontinent).The supercontinent existed from Cambrian to Jurassic time & mainly composed of South America &






50. A hole or basin cut into bedrock of a stream by the abrasive action of pebbles and sand swirled by turbulent stream flow.