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 point on the Earth's surface that is directly above the focus of an earthquake.






2. The sudden fall of one or more large pieces of a rock from a cliff.






3. A volcano that is composed of alternating layers of lava and pyroclastic material & along with abundant dikes and sills. Viscous & intermediate lava may flow from a central vent. Example: Mt. Fuji in Japan.






4. The remains of an extremely massive star pulled into a small volume by the force of gravity.






5. Living in water.






6. An era of geologic time lasting from 570 to 245 million years ago.






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






8. An area in which a large number of windmills have been erected to generate electrical power.






9. The tectonic region in which two plates meet.






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






11. The science that deals with the study of the planet Earth--the materials of which it is made & the processes that act to change these materials from one form to another & and the history recorded by these materials; the forces acting to deform the ou






12. The accumulation of material in layers or beds.






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






14. Soil conditions prevailing in area whose mean annual temperature is 0o C.






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






16. Ratio between weight of given volume of material and weight of equal volume of pure water.






17. To change back and forth uncertainly.






18. Distance over which wave-forming winds blow.






19. The amount of material a stream carries in suspension.






20. The low spot between two successive waves.






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






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






23. The effect of water and carbon dioxide absorbing outgoing infrared radiation & raising a system's temperature. The term is generally used with reference to the Earth's temperature & although it can also be applied to other systems & such as greenhous






24. That portion of the Earth below the crust and reaching to about 2 &780 km & where a transition zone of about 100 km thickness separates it from the core.






25. Deserts in zones of descending air between 25 degrees and 30 degrees north and south latitude.






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






27. Flat land covered with tall grass and wildflowers.






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






29. The distance between two successive wave crests or troughs.






30. The areas of & in & or constituting a city.






31. A narrow & steep-walled depression in the ocean floor & much deeper than the adjacent ocean and associated with a subduction zone.






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






33. Any molten material that is extrusive or volcanic & or the rock that forms from a molten extrusive. Molten rock that flows at the Earth's surface.






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






35. A mound or ridge of sediment deposited by a glacier.






36. The rise and fall of sea level caused by the gravitational pull of the Sun and Moon on the Earth.






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






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






39. A reverse fault on which the dip angle of the fault plane is 15 degrees or less.






40. The process of mountain building.






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






42. Geologic time expressed in years before the present.






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






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






45. No identifiable layers of minerals in a rock sample






46. A small & dust-bearing whirlwind.






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






48. A broad & mound-like mass of glacier ice that usually spreads radially outward from a central zone.






49. 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.






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