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






2. 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.






3. To wash or scrub away.






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






5. The partial or complete blocking from view of one object by another.






6. A fracture or zone of fractures along the boundaries of tectonic plates where movement has taken place.






7. A seismic body wave that involves particle motion from side to side & perpendicular to the direction of wave propagation. S-waves are slower than P-waves and cannot travel through a liquid.






8. He area from which a stream and its tributaries receives its water.






9. The rock beneath the soil.






10. Plutonic. Antonym of extrusive. Pertaining to igneous rocks or features formed by the emplacement of magma in pre-existing rocks.






11. Scratches & or small channels & gouged by glacier action. Occur on boulders & pebbles & and bedrock. Striations along bedrock indicate direction of ice movement.






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






13. The current geologic era & which began 66.4 million years ago and continues to the present.






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






15. 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.






16. A large volume of dust-sized particles lifted high into the atmosphere.






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






18. The closest galaxy to the Milky way. It is approximately 2 million light-years away.






19. An instrument that detects & magnifies & and records vibrations of the Earth & especially earthquakes.






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






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






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






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






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






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






26. The zone below the zone of aeration in which all pore spaces are filled with water.






27. A waterway from open ocean into a lagoon.






28. The very small particles of dirt & soot & and other pollutants that are present in the air.






29. 1. A low & bowl-shaped area of land surrounded by higher lands. 2. any large depression in which sediments are deposited.






30. A sedimentary rock made up of chemical sediments. Example: rock salt.






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






32. A sharp bend & loop or turn in a stream's course. When abandoned & it is called a meander scar or an oxbow.






33. Forms along a coast as wave erosion cuts through a headland.






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






35. A natural open space underground & large enough for a person to enter. Most commonly occur by the dissolution of soluble rocks & generally limestone.






36. The layer of gases (air) & that surrounds a planet or moon.






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






38. Bent rock strata.






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






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






41. A large area of flat or nearly flat land.






42. Temporary accumulations of sediments that collect between low and high water marks.






43. A chuck of rock or dust in space.






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






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






46. In a stream & the volume of water passing through a channel in a given time.






47. A flood that rises and falls very rapidly.






48. A sedimentary rock composed primarily of biogenic sediments.






49. Deposition of fine mineral particles (silt) on the beds of streams or lakes.






50. A naturally occurring inorganic solid that has a well-defined chemical composition and in which atoms are arranged in an ordered fashion.