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






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






3. The two days of the year on which the noon sun is directly overhead at either 23.5






4. Similar to a groin but built to keep sand out of a harbor entrance.






5. A molecule composed of three atoms of oxygen and mostly found in the stratosphere. Though beneficial in the upper atmosphere & at ground level & ozone is called photochemical smog & and is a respiratory irritant and considered a pollutant.






6. A stone or boulder & glacially transported from place of origin and left in an area of different bedrock composition.






7. A thick layer of soil.






8. The top of a wave.






9. 1. Breach in a natural levee . 2. Deep crevice or open fracture in glacier ice.






10. 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






11. The reserves of a valuable mineral commodity plus all other mineral deposits that may eventually become available & even those that are presumed to exist but have not yet been discovered and those that are not economically or technologically exploita






12. A general term for a relatively hard layer of soil at or just below the ground surface & cemented by silica & iron oxide & calcium carbonate & or organic matter.






13. A narrow & elongate region in which one lithospheric plate descends relative to another.






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






15. A glaciated valley now flooded by the sea.






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






17. 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.






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






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






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






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






22. An informal term to include all geologic time from the beginning of the Earth to the beginning of the Cambrian period 570 million years ago.






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






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






25. The presence of layers in some rocks caused by parallel alignment of minerals.






26. A wall built out from the shore & usually at perpendicular to it to trap sand carried by longshore currents .






27. A narrow strip of land that has water on either side and connects two larger bodies of water.






28. A vertical conduit through the Earth's crust below a volcano & through Which magma has passed.






29. 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






30. A large amount of gas and dust in space & spread out in an immense volume.






31. The speed at which water flows.






32. Any seismic wave that travels through the body of Earth & rather than along its surface.






33. 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.






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






35. A minor tremor that precedes an earthquake. An increase in seismicity may signal that a major release of strain energy is about to occur.






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






37. Mountains & characterized by extensive folding and thrust faulting & that form at convergent plate boundaries on continents.






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






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






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






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






42. An isolated & steep-sided & rocky mass or island just offshore from a rocky headland & usually on a shore platform.






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






44. A ridge of high water associated with a hurricane and which floods over the shore .






45. The oldest eon in Earth history & extending from the origin of the Earth to about 3.9 billion years ago.






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






47. Bent rock strata.






48. The chronological sequence of units of Earth time.






49. A large ridge or mound-like structure within a body of water that is built by calcareous organisms such as corals & red algae & and bivalves.






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