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 pattern of water circulation from the ocean to the atmosphere to the land and back to the ocean.






2. The production of living matter by organisms that make food using sunlight or chemicals. Usually expressed as grams of carbon per square meter per year.






3. All of space and everything in it.






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






5. To change back and forth uncertainly.






6. A ball of ice and dust & whose orbit is a long & narrow ellipse.






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






8. Where two plates collide to form mountains.






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






10. Extending across a continent.






11. The environment where a particular plant or animal is normally found.






12. A flat & dry plain covered with short grass.






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






14. Swamp that forms in the low lying flood plain behind a levee.






15. A low & nearly flat accumulation of sediment deposited at the mouth of a river or stream & commonly triangular or fan-shaped.






16. A geometrical form taken by a mineral & giving external expression to orderly internal atomic arrangement.






17. A sea wave produced by any large-scale & short duration disturbance on the seafloor & commonly a shallow submarine earthquake but possibly also a submarine slide or volcanic eruption.






18. The acidity in rain due to gases from internal combustion engines and coal- and oil-burning power plants.






19. The geologic eon lying between the Archean and Phanerozoic eons & beginning about 2.5 billion years ago and ending about 0.57 billion years ago.






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






21. An eon of geologic time extending from about 3.9 billion years to 2.5 billion years ago.






22. The processes of weathering by which physical actions such as frost wedging break down a rock into fragments & involving no chemical change.






23. Turbulent stream water flow down a steep gradient & but not as steep as in a waterfall.






24. Heat extracted from the Earth for use as an power source.






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






26. A lake of lava & usually basaltic & in a volcanic caldera.






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






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






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






30. A system that uses a constellation of 24 satellites & their ground stations & and individual GPS receivers to accurately locate points on Earth.






31. The process of removing metal from ore.






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






33. The study of earthquakes & and of the structure of the Earth by both natural and artificially generated seismic waves.






34. A process by which salts accumulate in soil.






35. An ingredient in a food or other substance that nourishes or promotes growth.






36. The relationship between distances in the area being mapped and distances in the map itself.






37. The top of a wave.






38. The accumulation of material in layers or beds.






39. A building that contains one or more telescopes.






40. Molten rock & containing dissolved gases and suspended solid particles. At the Earth's surface & magma is known as lava.






41. A blanket of wind-driven sand with an upper surface about a meter above ground level.






42. A method of sediment transport in which the turbulence of a fluid is able to keep particles supported in the fluid.






43. A sedimentary rock composed primarily of biogenic sediments.






44. A lake in an abandoned meander.






45. 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.






46. Enormous & thick sheets of rock that are part of the Earth's upper mantle that move and adjoin each other along zones of seismic activity. Many tectonic plates extend underneath both continents and sea floor.






47. Any object that revolves around another object in space.






48. An individual grain or constituent of a rock.






49. A ball of ice and dust & whose orbit is a long & narrow ellipse.






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