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






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






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






4. An individual grain or constituent of a rock.






5. Containing moisture.






6. A time of unusual winds and currents in the Pacific Ocean . El Nino generally causes warmer-than-normal sea surface temperatures and increased rainfall and storm activity.






7. Deserts formed by blocking moisture-bearing winds with mountain barriers.






8. A lake in an abandoned meander.






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






10. The areas of & in & or constituting a city.






11. A system involving continuous interaction of the solid Earth & the atmosphere & the oceans and living things.






12. No identifiable layers of minerals in a rock sample






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






14. The elevation at which snow persists throughout the year.






15. A minor tremor that precedes an earthquake. An increase in seismicity may signal that a major release of strain energy is about to occur.






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






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






18. The surface between the zone of saturation and the zone of aeration.






19. The outermost layer of the Earth & varying in thickness from about 10 kilometers (6 miles) below the oceans & to 65 kilometers (about 40 miles) below the continents; represents less than 1 percent of the Earth's volume.






20. The amount of dissolved salt in water.






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






22. The process of mountain building.






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






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






25. Gases that can be dissociated by solar radiation & which releases chlorine & which in turn destroys ozone.

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26. The line separating land and water.






27. 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.






28. Occurs at the intersection of the water table with the ground surface.






29. The formation & advance and retreat of glaciers and the results of these activities.






30. Igneous. Antonym of intrusive. Synonym of volcanic. Pertaining to igneous rocks or features formed from lava released on the Earth's surface.






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






32. A lake in an abandoned meander.






33. Saturn is named after the Roman god of the harvest. It is the sixth planet from the Sun.






34. A flood that rises and falls very rapidly.






35. A substance that produces positively charged hydrogen ions (H+) when dissolved in water.






36. An instrument that detects & magnifies & and records vibrations of the Earth & especially earthquakes.






37. To preserve & or to avoid wasteful use.






38. An area where fresh water comes into contact with seawater & usually in a partly enclosed coastal body of water; a mix of fresh and salt water where the current of a stream meets the tides.






39. An earthquake that follows and has its epicenter near a larger earthquake.






40. A device built to study distant objects by making them appear closer.






41. Pertaining to clastic material formed by volcanic explosion or aerial expulsion from a volcanic vent.






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






43. A chuck of rock or dust in space.






44. Swamp that forms in the low lying flood plain behind a levee.






45. Water beneath the Earth's surface.






46. A small ice sheet.






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






48. A measure of the size of an earthquake in terms of the damage it causes.






49. The distance between two successive wave crests or troughs.






50. A seismic body wave that involves particle motion from side to side & perpendicular to the direction of wave propagation. S-waves are slower than P-waves and cannot travel through a liquid.