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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. 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.






3. The amount of dissolved salt in water.






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






5. The process by which ocean floors spread laterally from crests of main ocean ridges. As material moves laterally from the ridge & new material replaces it along the ridge crest by welling upward from the mantle.






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






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






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






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






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






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






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






13. An earthquake that follows and has its epicenter near a larger earthquake.






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






15. The breaking away of ice from the front of the glacier when it ends in a lake or an ocean. Produces icebergs.






16. Heat transport by moving particles & and the thermal energy that they carry & to a new location.






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






18. A volcano in the shape of a flattened cone & broad and low & built by very fluid flows of basaltic lava.






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






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






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






22. The height of a place above sea level.






23. Lava extruded beneath water characterized by pillow shapes.






24. The surface between the zone of saturation and the zone of aeration.






25. Swamp that forms in the low lying flood plain behind a levee.






26. That portion of the Earth below the crust and reaching to about 2 &780 km & where a transition zone of about 100 km thickness separates it from the core.






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






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






29. A coral reef attached directly to the mainland.






30. The zones of seismic activity long which plates are in contact.






31. A measure of acidity.






32. 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 &






33. A division of geologic time next shorter than a period. Example: the Pleistocene epoch is in the Quaternary period.






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






35. Open pit mining & typically for coal.






36. Heat transport by moving particles & and the thermal energy that they carry & to a new location.






37. A Hawaiian term for a basaltic lava flow with a smooth & or ropy surface.






38. A rock changed from its original form and/or composition by heat & pressure &shearing stress & or chemically active fluids & or some combination of them.






39. A volcanic mountain on the seafloor. If flat-topped & it is a guyot.






40. A process of land degradation initiated by human activity & particularly in the zones along the margins of deserts.






41. A group of islands; an expanse of water with scattered islands.






42. Applies to igneous rocks that cool on the surface of the Earth & including beneath water; typically with small crystals due to the rapidity of cooling. Synonym of extrusive. Antonym of plutonic.






43. An icicle-shaped accumulation of dripstone hanging from cave roof.






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






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






46. A division of geologic time next shorter than a period. Example: the Pleistocene epoch is in the Quaternary period.






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






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






49. A general term including both oil and natural gas.






50. Applies to igneous rocks that cool on the surface of the Earth & including beneath water; typically with small crystals due to the rapidity of cooling. Synonym of extrusive. Antonym of plutonic.






Can you answer 50 questions in 15 minutes?



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