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. A process by which salts accumulate in soil.






2. Lies half way between the north and south magnetic poles.






3. 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.






4. The accumulation of material in layers or beds.






5. Flat land covered with tall grass and wildflowers.






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






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






8. A soft compact calcite & CaCO3 & with varying amounts of silica & quartz & feldspar & or other mineral impurities & generally gray-white or yellow-white and derived chiefly from fossil seashells.






9. Any solid material that has settled out of a state of suspension in liquid.






10. The tectonic region in which two plates meet.






11. 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.






12. A thick layer of soil.






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






14. 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.






15. A hot & gaseous & self-luminous celestial body & as the Sun.






16. The symbol used on a map to indicate directions & both cardinal and ordinal.






17. The process of mountain building.






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






19. The concept of a sequence of events involving the formation & alteration & destruction and reformation of rocks as a result of geologic processes.






20. A broad & mound-like mass of glacier ice that usually spreads radially outward from a central zone.






21. The direction & north (normal) or south (reversed) & that a magnetic compass needle points.






22. The very slow & generally continuous downslope movement of soil and debris under the influence of gravity.






23. A measure of the strength of an earthquake based on the amount of movement recorded by a seismograph . compare Richter scale.






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






25. A landscape that develops from the action of ground water in areas of easily soluble rocks. It is usually characterized by caves & underground drainage and sinkholes.






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






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






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






29. 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.






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






31. A curved belt of volcanic islands lying above a subduction zone.






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






33. A zone in the Earth between 400 and 670 km below the surface separating the upper mantle from the lower mantle.






34. 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.






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






36. The rigid outer shell of the Earth. It includes the crust and uppermost mantle and is on the order of 100 km in thickness.






37. The sum of the processes that result in the wearing away or the progressive lowering of the Earth's surface by weathering & erosion & mass wasting & and transportation.






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






39. A steep-sided rounded extrusion of highly viscous lava squeezed out from a volcano and forming a dome-shaped or bulbous mass above and around the volcanic vent. The structure generally develops inside a volcanic crater.






40. Lacking in rainfall & very dry.






41. A mound or ridge of sediment deposited by a glacier.






42. (Latin- Sol & Greek- Helios)the closest star to Earth. It is a giant ball of gas without any solid surface.






43. A sedimentary rock composed primarily of biogenic sediments.






44. Water beneath the Earth's surface.






45. A coral reef separated from the mainland by a lagoon.






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






47. A hole or basin cut into bedrock of a stream by the abrasive action of pebbles and sand swirled by turbulent stream flow.






48. A large area with common features that set it apart from other areas.






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






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