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






2. Till deposited from main body of glacier during ablation.






3. The outermost part of the core. It is liquid & about 1 &700 km thick & and separated from the inner & solid core by a transition zone about 565 km thick.






4. A steep or vertical cliff & either above or below sea level.






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






6. An artificial hill formed by the debris of successive human settlements.






7. 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.






8. A delta formed at both sides of a tidal inlet.






9. Any form of water & such as rain & sleet & or snow & that falls to Earth's surface.






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






11. A sedimentary rock composed of combustible matter derived from the partial decomposition of plant material.






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






13. Any molten material that is extrusive or volcanic & or the rock that forms from a molten extrusive. Molten rock that flows at the Earth's surface.






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






15. A statement of relative age in layered rocks: In a series of sedimentary rocks that has not been overturned & the topmost layer is always the youngest and the bottommost layer is always the oldest.






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






17. No identifiable layers of minerals in a rock sample






18. 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.






19. The solid innermost part of the core with a diameter of a little over 1 &200 km.






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






21. A process of erosion in which wind carries off particles of dust and sand.






22. The Sun with all the celestial bodies that revolve around it.






23. 1. A mass of sand & gravel & or alluvium deposited on the bed of a stream & sea & or lake & or at the mouth of a stream 2. A unit of pressure & approximately equal to atmospheric pressure at sea level.






24. Deserts formed by blocking moisture-bearing winds with mountain barriers.






25. The vertical distance between the crest and adjacent trough of a wave.






26. A lake in an abandoned meander.






27. A division of geologic time next smaller than the eon and larger than a period. Example: The Paleozoic era is in the Phanerozoic eon and includes & among others & the Devonian period.






28. The attractive force between two objects; its magnitude depends on their masses and the distance between them.






29. Verifying assessments made from satellite data by doing direct & 'on-the ground' measurements.






30. Shapes & like mountains or hills that make up the Earth's surface.






31. The speed at which water flows.






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






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






34. Reduction of pore space between individual particles as the result of overlying sediments or of tectonic movements.






35. Living on land.






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






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






38. The speed at which water flows.






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






40. The rise and fall of sea level caused by the gravitational pull of the Sun and Moon on the Earth.






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






42. A type of disintegration in which jointed rock is forced apart by the expansion of water as it freezes in fractures.






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






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






45. Fossils formed when water containing minerals leaks into a mold. The minerals harden to form a copy of the original structure or organism.






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






47. 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.






48. A dense & hot (sometimes incandescent) cloud of volcanic ash and gas produced in a Pelean eruption.






49. A rock that has crystallized from a molten state.






50. To preserve & or to avoid wasteful use.