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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 thickened elevated region of Earth's crust that is mainly (but not entirely) above sea level.






2. The naturally occurring material from which a mineral or minerals of economic value can be extracted at a profit.






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






4. 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.






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






6. An atmospheric shield providing the Earth with protection from ultra-violet rays which can cause sun burn & skin cancer and the destruction of the delicate plant life which supports the planet's food chain.






7. A stone or boulder & glacially transported from place of origin and left in an area of different bedrock composition.






8. Soil conditions prevailing in area whose mean annual temperature is 0o C.






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






10. The mass of an object divided by its volume.






11. 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.






12. The layer of gases (air) & that surrounds a planet or moon.






13. A mudflow composed chiefly of pyroclastic material on the flanks of a volcano.






14. A permeable region of rock or soil through which ground water can move.






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






16. Similar to a groin but built to keep sand out of a harbor entrance.






17. 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.






18. That portion of the resources for a valuable mineral commodity that can be extracted from the Earth at a profit today.






19. An area of land that delivers runoff water & sediment & and dissolved substances to surface water bodies & such as rivers or lakes. All watersheds consist of boundaries & a basin and collection areas.






20. 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.






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






22. A narrow strip of land along the margin of the ocean extending inland for a variable distance from low water mark.






23. The great circle on the Earth's surface passing through The North and South Poles & which is considered 0 degrees longitude. The prime meridian passes through Greenwich & England & and is used as a reference point for measuring longitude east and w






24. Turbulent stream water flow down a steep gradient & but not as steep as in a waterfall.






25. Materials that are found in nature that are useful or necessary for people to live.






26. The physical & chemical & and biological processes by which rock at or near the Earth's surface is broken down into smaller pieces.






27. A small & dust-bearing whirlwind.






28. The region of a shore that is covered at high tide and exposed at low tide.






29. A chuck of rock or dust in space.






30. A general term for a relatively hard layer of soil at or just below the ground surface & cemented by silica & iron oxide & calcium carbonate & or organic matter.






31. A continuous well-defined mass of material of sufficient ore content to make extraction economically feasible. compare mineral deposit.






32. The most recent eon of geologic time beginning 570 million years ago and continuing to the present.






33. Glacial drift composed of rock fragments that range from clay to boulder size and randomly arranged without bedding.






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






35. The relationship between distances in the area being mapped and distances in the map itself.






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






37. A chuck of rock or dust in space.






38. The geologic eon lying between the Archean and Phanerozoic eons & beginning about 2.5 billion years ago and ending about 0.57 billion years ago.






39. An astronomical instrument for measuring angles & primarily altitude of celestial bodies to determine latitude.






40. A small & dust-bearing whirlwind.






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






42. Elongated rises on the ocean floor where basalt periodically erupts & forming new oceanic crust.






43. A study designed to collect critical data to be used for comparison or as a control in a later study.






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






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






46. The process of one plate descending beneath another.






47. The rock beneath the soil.






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






49. A deposit of partly decayed plant remains in a very wet environment; marsh or swamp deposit of plant remains containing more than 50 percent carbon.






50. Deposits of wind-borne dust.







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