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






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






3. Weathering processes that are the result of chemical reactions. Example: the transformation of orthoclase to kaolinite.






4. The way in which a rock or mineral breaks in random patterns rather than cleaving






5. A conical volcano formed by the accumulation of pyroclastic debris around a vent.






6. A type of thermal spring which ejects water intermittently with considerable force.






7. Living in water.






8. The zone below the zone of aeration in which all pore spaces are filled with water.






9. A segment of an active fault zone that has not experienced a major earthquake during a time period when most other segments of the zone have. They are generally regarded as having a higher potential for future earthquakes.






10. An eon of geologic time extending from about 3.9 billion years to 2.5 billion years ago.






11. Flat land covered with tall grass and wildflowers.






12. An imaginary circle around the earth that represents the halfway mark between the North and South Poles and establishes the boundary between the Northern and Southern Hemispheres.






13. 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.






14. The process by which building stone & usually in blocks or sheets & is extracted from the Earth. radiation -- (Electromagnetic radiation) -- energy that travels through space in the form of waves without the intervention of matter & as in the transp






15. The low spot between two successive waves.






16. No identifiable layers of minerals in a rock sample






17. The principle that states the processes operating to change the Earth in the present also operated in the past.






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






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






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






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






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






23. The process by which building stone & usually in blocks or sheets & is extracted from the Earth. radiation -- (Electromagnetic radiation) -- energy that travels through space in the form of waves without the intervention of matter & as in the transp






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






25. The accumulation of material in layers or beds.






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






27. Woodland that usually gets at least 100 inches of rain each year.






28. An aggregate of one or more minerals in varying proportions.






29. The closest star to Earth besides the sun. It is approximately 4 light years away.






30. The very small particles of dirt & soot & and other pollutants that are present in the air.






31. The process of mountain building.






32. Either the northern or southern half of the Earth as divided by the equator & or the eastern or western half as divided by a meridian.






33. A hydrocarbon (coal or petroleum) that can be extracted from the Earth for use as a fuel. Fossil fuels are non-renewable energy sources.






34. An abandoned meander .






35. The two days of the year on which the noon sun is directly overhead at either 23.5






36. Till deposited from main body of glacier during ablation.






37. An era of time during the Phanerozoic eon lasting from 245 million years ago to 66.4 million ago.






38. As applied to glacier ice & the process by which ice below the snow line is wasted by evaporation and melting.






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






40. The galaxy where Earth is located.






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






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






43. The presence of layers in some rocks caused by parallel alignment of minerals.






44. 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.






45. 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.






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






47. Bent rock strata.






48. A coral reef attached directly to the mainland.






49. A lake in an abandoned meander.






50. A type of disintegration in which jointed rock is forced apart by the expansion of water as it freezes in fractures.







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