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






2. A disease-causing organism or entity & such as a bacterium or virus.






3. 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.






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






5. To change back and forth uncertainly.






6. Jupiter is named after the Roman king of the gods. It is the fifth planet from the Sun.






7. 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.






8. A disease-causing organism or entity & such as a bacterium or virus.






9. The part of the crust that directly underlies the continents and continental shelves. Averages about 35 km in thickness & but may be over 70 km thick under largest mountain ranges.






10. The weak or 'soft' zone in the upper mantle just below the lithosphere & involved in plate movement and isostatic adjustments. It lies 70 to 100 km below the surface and may extend to a depth of 400 km.






11. A vent on the seafloor from which hydrothermal fluids are emitted. Upon mixing with seawater and cooling & the fluids precipitate a cloud of fine-grained sulfide minerals that resembles a cloud of black smoke.






12. A valley carved by glacier erosion and whose cross-valley profile has steep sides and a nearly flat floor & suggestive of a large letter 'you'.






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






14. Heat transport by direct transfer of energy from one particle to another & without moving the particle to a new location.






15. 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.






16. A person who makes maps.






17. All of space and everything in it.






18. The height of a place above sea level.






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






20. 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.






21. A community of plants and/or animals and its physical environment & regarded as a unit.






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






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






24. A valley carved by glacier erosion and whose cross-valley profile has steep sides and a nearly flat floor & suggestive of a large letter 'you'.






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






26. Iron & aluminum & magnesium & manganese & and titanium. Ores of the abundant metals only need to be 3 - 5 times as metal-rich as average rock.






27. A coral reef separated from the mainland by a lagoon.






28. Where two plates collide to form mountains.






29. Igneous. Antonym of intrusive. Synonym of volcanic. Pertaining to igneous rocks or features formed from lava released on the Earth's surface.






30. The rock beneath the soil.






31. A portable time keeper with a mechanism for ensuring accuracy and adjusting itself & used for determining longitude at sea.






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






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






34. An instrument that merely indicates the occurrence of an earthquake.






35. Where two plates are moving in opposite directions as in a mid-ocean ridge.






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






37. The physical & chemical & and biological processes by which rock at or near the Earth's surface is broken down into smaller pieces.






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






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






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






41. The rigid outer shell of the Earth. It includes the crust and uppermost mantle and is on the order of 100 km in thickness.






42. The innermost zone of Earth. It consists of two parts & an outer liquid section and an inner solid section & both chiefly of iron and nickel with about 10 percent lighter elements. It is surrounded by the mantle.






43. 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.






44. The process of removing metal from ore.






45. A small & dust-bearing whirlwind.






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






47. A small & dust-bearing whirlwind.






48. Where two plates are moving in opposite directions as in a mid-ocean ridge.






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






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