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






2. As applied to glacier ice & the process by which ice below the snow line is wasted by evaporation and melting.






3. A vent in the surface of the Earth & from which lava & ash & and gases erupt.






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

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






6. A downward distortion or dimple in the water table that forms as a well pumps water faster than it can flow through the aquifer.






7. Saturn is named after the Roman god of the harvest. It is the sixth planet from the Sun.






8. A group of stars that appear to make a pattern in the sky. The Big Dipper is a constellation.






9. 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






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






11. Formed when an organism is flattened (compressed) and a thin film of organic material from its body is left in the rock.






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






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






14. A natural depression in the surface of the land caused by the collapse of the roof of a cavern or subterranean passage & generally occurring in limestone regions.






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






16. A commonly used scale of earthquake intensity.






17. A famous scientist who proposed that the Sun was the center of the solar system not the Earth. (Heliocentrism)






18. An abandoned meander .






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






20. (Latin- Terra & Greek- Gaia) Earth is named after the ancient Germanic Goddess of the soil. It is the third planet from the Sun.






21. Heat extracted from the Earth for use as an power source.






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






23. All unconsolidated materials above bedrock. Natural earthy materials on the Earth's surface & in places modified or even made by human activity & containing living matter & and supporting or capable of supporting plants out of doors.






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






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






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






27. The generally dark & more or less stable part of the organic matter in a soil & so well decomposed that the original sources cannot be identified.






28. Flat land covered with tall grass and wildflowers.






29. A detailed mathematical description of the cause-and-effect relationships between events that can be used to predict or explain other such events.






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






31. The Earth's crust underlying the ocean basins which is formed at mid-oceanic ridges. It is typically 5 to 10 kilometers thick composed of basalt.






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






33. Where two plates collide to form mountains.






34. The portion of the continental margin that extends as a gently sloping surface from the shoreline seaward to a marked change in slope at the top of the continental slope . Seaward depth averages about 130 m.






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






36. Large area of extremely flat ocean floor lying near a continent and generally over 4 km in depth.






37. Bent rock strata.






38. A valley caused by extension of the Earth's crust. Its floor forms as a portion of the crust moves downward along normal faults.






39. The process by which an unconsolidated deposit of sediments is converted in to solid rock.






40. The process of removing metal from ore.






41. To change back and forth uncertainly.






42. A method of sediment transport in which the turbulence of a fluid is able to keep particles supported in the fluid.






43. The process of one plate descending beneath another.






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






45. The explosion of a dying giant or supergiant star.






46. Deserts in zones of descending air between 25 degrees and 30 degrees north and south latitude.






47. Property possessed by certain rocks of breaking with relative ease along parallel planes or nearly parallel surfaces in their crystal structures where the bonds are weakest.






48. A valley caused by extension of the Earth's crust. Its floor forms as a portion of the crust moves downward along normal faults.






49. A pillar formed as a stalactite and stalagmite meet.






50. The study of earthquakes & and of the structure of the Earth by both natural and artificially generated seismic waves.