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 sudden fall of one or more large pieces of a rock from a cliff.






2. A mass of ice & formed by the recrystallization of snow & that flows forward & or has flowed at some time in the past.






3. The two days of the year on which neither hemisphere is tilted toward or away from the sun.






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






5. Surficial mining & in which the valuable rock is exposed by removal of overlying rock or soil.






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

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7. 1. Breach in a natural levee . 2. Deep crevice or open fracture in glacier ice.






8. An individual grain or constituent of a rock.






9. A type of volcanic eruption characterized by nuees ardentes and the development of lava domes.






10. A vertical conduit through the Earth's crust below a volcano & through Which magma has passed.






11. Deserts in zones of descending air between 25 degrees and 30 degrees north and south latitude.






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






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






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






15. One of several rock-forming minerals that contain at least 95% silica (quartz). and usually one or more other common elements.






16. 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.






17. 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.






18. The initial point within the Earth that ruptures in an earthquake & directly below the epicenter. The point within the Earth which is the center of an earthquake & at which strain energy is first released and converted to elastic wave energy.






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






20. The line that separates one drainage basin from another.






21. 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.






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






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






24. 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.






25. 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 &






26. Sediment formed by chemical precipitation from water. Example: halite precipitated as the result of the evaporation of sea water.






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






28. A major drainage divide separating the drainage to one ocean from another.






29. A large volume of dust-sized particles lifted high into the atmosphere.






30. A sharp bend & loop or turn in a stream's course. When abandoned & it is called a meander scar or an oxbow.






31. An eruption of lava that takes place from a fracture & usually without producing a cone.






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






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






34. The vertical distance between the crest and adjacent trough of a wave.






35. 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.






36. The chronological sequence of units of Earth time.






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






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






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






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






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






42. A mass of ice & formed by the recrystallization of snow & that flows forward & or has flowed at some time in the past.






43. A small ice sheet.






44. A planetary satellite.






45. Pluto is named after the Roman god of the Underworld. No longer considered a planet.






46. Enormous & thick sheets of rock that are part of the Earth's upper mantle that move and adjoin each other along zones of seismic activity. Many tectonic plates extend underneath both continents and sea floor.






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






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






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






50. Mercury is named after the Roman messenger of the gods. It is the closest to the Sun.