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






2. A rigid segment of the Earth's lithosphere that moves horizontally and adjoins other plates along zones of seismic activity. Plates may include portions of both continents and ocean basins.






3. The amount of dissolved salt in water.






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






5. A sea level change due to change in load on Earth's crust.






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






7. 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.






8. An abandoned meander .






9. Water beneath the Earth's surface.






10. Elongated rises on the ocean floor where basalt periodically erupts & forming new oceanic crust.






11. The arrangement of rock units in the proper chronological order from youngest to oldest.






12. Highly mafic igneous volcanic rock & typically fine-grained and dark in color; rough volcanic equivalent of gabbro. Basalt is the most abundant volcanic rock in the Earth's crust.






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






14. 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.






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. 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.






17. A large & basin-shaped volcanic depression & more or less circular in form. Typically steep-sided & found at the summit of a shield volcano.






18. A conical volcano formed by the accumulation of pyroclastic debris around a vent.






19. Flat land covered with tall grass and wildflowers.






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






21. A post of dripstone growing up from a cave floor.






22. Either the northern or southern half of the Earth as divided by the equator & or the eastern or western half as divided by a meridian.






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. The green pigment in the cells of many plants that enables them to use sunlight to convert carbon dioxide and water into carbohydrates in the process called photosynthesis.






25. The chronological sequence of units of Earth time.






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






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






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






29. 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.






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






31. The low spot between two successive waves.






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






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






34. Any place where bedrock is visible on the surface of the Earth.






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






36. A cavity in a lava & formed by the entrapment of a gas bubble during solidification of the lava.






37. One of several rock-forming minerals that contain at least 95% silica (quartz). and usually one or more other common elements.






38. Objects revolving around the sun that are too small and too numerous to be considered planets.






39. A process by which salts accumulate in soil.






40. The reflection of light on a given mineral's surface & classified by intensity and quality.






41. A glaciated valley now flooded by the sea.






42. Rock formed from the accumulation of sediment & Which may consist of fragments and mineral grains of varying sizes from pre-existing rocks & remains or products of animals and plants & the products of chemical action & or mixtures of these.






43. A device containing a free-swinging magnetic needle that is attracted to Earth's magnetic North Pole. Used to determine direction of travel.






44. Living in water.






45. The closest star to Earth besides the sun. It is approximately 4 light years away.






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






47. A flood that rises and falls very rapidly.






48. A cavity in a lava & formed by the entrapment of a gas bubble during solidification of the lava.






49. A worldwide change in sea level & such as caused by melting glaciers.






50. Produced as a wave steepens and falls forward as the wave nears the shore.