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 depression in the ground formed by the melting of a block of glacier ice buried or partially buried by drift.






2. 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.






3. A river that is able to maintain its flow through a desert because of water received from outside the desert.






4. 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






5. The low spot between two successive waves.






6. A detailed mathematical description of the cause-and-effect relationships between events that can be used to predict or explain other such events.






7. A statement of relative age in layered rocks: In a series of sedimentary rocks that has not been overturned & the topmost layer is always the youngest and the bottommost layer is always the oldest.






8. A measure of acidity.






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






10. All of space and everything in it.






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






12. Heat transport by direct transfer of energy from one particle to another & without moving the particle to a new location.






13. A process by which salts accumulate in soil.






14. To change back and forth uncertainly.






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






16. A collection of maps.






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






18. The average weather conditions of an area over many years & as measured by temperature & wind speed & and precipitation.






19. The innermost zone of Earth. It consists of two parts & an outer liquid section and an inner solid section & both chiefly of iron and nickel with about 10 percent lighter elements. It is surrounded by the mantle.






20. The primary division of geologic time which are & from oldest to youngest & the Hadean & Archean & Proterozoic & and Phanerozoic eons.






21. Where two plates are moving in opposite directions as in a mid-ocean ridge.






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






23. 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.






24. A broad & deep & generally straight furrow carved in bed rock by the abrasive action of debris embedded in a moving glacier. Larger and deeper than a glacial striation.






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






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






27. The prediction that climate will warm as a result of the addition to the atmosphere of humanly produced greenhouse gases.






28. The speed at which water flows.






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






31. The primary division of geologic time which are & from oldest to youngest & the Hadean & Archean & Proterozoic & and Phanerozoic eons.






32. Highly mafic igneous volcanic rock & typically fine-grained and dark in color; rough volcanic equivalent of gabbro. Basalt is the most abundant volcanic rock in the Earth's crust.






33. 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 &






34. A narrow & steep-walled depression in the ocean floor & much deeper than the adjacent ocean and associated with a subduction zone.






35. Mountains & characterized by extensive folding and thrust faulting & that form at convergent plate boundaries on continents.






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






37. A flat & dry plain covered with short grass.






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






39. Lacking in rainfall & very dry.






40. The accumulation of material in layers or beds.






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






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






43. An ingredient in a food or other substance that nourishes or promotes growth.






44. The area bordering a stream over which water spreads when the stream tops its channel banks.






45. In a stream & the volume of water passing through a channel in a given time.






46. The seaward edge of coast between low tide and effective wave action.






47. A roughly circular reef with an occasional small & low & coral sand island surrounding a shallow lagoon.






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






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






50. A comet that passed Earth in 1997 and won't return to the inner solar system until the year 4377.