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Earth Science

Subject : science
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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 post of dripstone growing up from a cave floor.






2. Any of various minerals prized for beauty & durability & and rarity. A few noncrystalline materials of organic origin (e.g. & pearl & red coral & and amber) also are classified as gemstones.






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






4. Temporary accumulations of sediments that collect between low and high water marks.






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






6. A community of plants and/or animals and its physical environment & regarded as a unit.






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






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






9. The resistance of a mineral to scratching & as measured by the Mohs scale.






10. An area subject to dust storms & especially south central United States .






11. A slide involving a downward and usually sudden movement of newly detached segments of bedrock sliding or slipping over an inclined surface of weakness such as a bedding plane & fault plane & or joint surface.






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






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






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






15. A plate boundary in which plates on opposite sides of the boundary move past each other in opposite directions. The San Andreas fault of California is a good example.






16. The low spot between two successive waves.






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






18. The processes of weathering by which physical actions such as frost wedging break down a rock into fragments & involving no chemical change.






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






20. A layer of sedimentary rock; plural is strata.






21. A guide to reading a map that typically contains distance scales & arrows indicating direction & and/or explanations of symbols used.






22. A system that uses a constellation of 24 satellites & their ground stations & and individual GPS receivers to accurately locate points on Earth.






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






24. Where one plate slides beneath another plate as the two are pushed together & a subduction zone.






25. The first scientist to make systematic use of the telescope in looking at the heavens.






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






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






28. The rock beneath the soil.






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






30. Containing moisture.






31. To change back and forth uncertainly.






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






33. Refers to rock or sediments made up primarily of broken fragments of pre-existing rocks or minerals.






34. The perpendicular or very steep descent of a stream.






35. A commonly used measure of earthquake magnitude & based on a logarithmic scale. Each integral step on the scale represents a tenfold increase in the extent of ground shaking & as recorded on a seismograph.






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






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






38. Plutonic. Antonym of extrusive. Pertaining to igneous rocks or features formed by the emplacement of magma in pre-existing rocks.






39. Forms along a coast as wave erosion cuts through a headland.






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






41. Deposition of fine mineral particles (silt) on the beds of streams or lakes.






42. The dust-sized & sharp-edged & glassy particles resulting from an explosive volcanic eruption.






43. To preserve & or to avoid wasteful use.






44. 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.






45. Of or relating to or containing basalt & a dark & dense & extrusive rock that has a silica content of 40% to 50% and makes up most of the ocean floor.






46. The chronological sequence of units of Earth time.






47. The science that deals with the study of the planet Earth--the materials of which it is made & the processes that act to change these materials from one form to another & and the history recorded by these materials; the forces acting to deform the ou






48. A division of geologic time next smaller than the eon and larger than a period. Example: The Paleozoic era is in the Phanerozoic eon and includes & among others & the Devonian period.






49. A sea level change due to change in load on Earth's crust.






50. A device containing a free-swinging magnetic needle that is attracted to Earth's magnetic North Pole. Used to determine direction of travel.







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