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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. Geologic time expressed in years before the present.






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






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






4. 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.






5. Water that flows across watersheds during and immediately after severe rainstorms. In populated areas & stormwater runoff is often water that cannot be handled by existing sewer systems. Stormwater runoff is the leading source of water pollution in t






6. Water beneath the Earth's surface.






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






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






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. To preserve & or to avoid wasteful use.






11. The distance between two successive wave crests or troughs.






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






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






14. A cyclical pattern of movement in a fluid body such as the ocean & the atmosphere & or the Earth's mantle & driven by density variations which in turn are the result of differences in temperature from one part of the fluid to another.






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






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






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






18. Banks of sand and silt along stream bank built by deposition in small increments during successive floods.






19. A Hawaiian term for a lava flow that has a rough & jagged surface.






20. A roughly circular reef with an occasional small & low & coral sand island surrounding a shallow lagoon.






21. The rock beneath the soil.






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






23. Mercury is named after the Roman messenger of the gods. It is the closest to the Sun.






24. 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.






25. The straightening and/or deepening of a river channel.






26. The color of a mineral in its powdered form obtained from scraping a sample on a ceramic plate






27. 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.






28. The prediction that climate will warm as a result of the addition to the atmosphere of humanly produced greenhouse gases.






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






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






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






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






33. A person who makes maps.






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






35. Ratio between weight of given volume of material and weight of equal volume of pure water.






36. A post of dripstone growing up from a cave floor.






37. A substance that produces positively charged hydrogen ions (H+) when dissolved in water.






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






39. Gases that can be dissociated by solar radiation & which releases chlorine & which in turn destroys ozone.

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40. A lake in an abandoned meander.






41. A depression in the ground formed by the melting of a block of glacier ice buried or partially buried by drift.






42. Surficial mining & in which the valuable rock is exposed by removal of overlying rock or soil.






43. 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






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






45. A flood that rises and falls very rapidly.






46. The internal resistance to flow in a liquid.






47. The transformation of a soil from a solid to a liquid state as the result of increased pore pressure.






48. The transformation of a soil from a solid to a liquid state as the result of increased pore pressure.






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






50. Any accumulation of material & by settling from water or air & chemical precipitation & evaporation from solution & etc.







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