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. Of or relating to or containing basalt & a dark & dense & extrusive rock that has a silica content of 40% to 50% and makes up most of the ocean floor.






2. The straightening and/or deepening of a river channel.






3. Any accumulation of material & by settling from water or air & chemical precipitation & evaporation from solution & etc.






4. Bent rock strata.






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






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






7. Evidence in rock of the presence of past life & such as a dinosaur bone & an ancient clam shell & or the footprint of a long-extinct animal as well as life history artifacts.






8. Living on land.






9. The seaward edge of coast between low tide and effective wave action.






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






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






12. A small ice sheet.






13. Distance over which wave-forming winds blow.






14. In the geologic time scale a unit of time less than an era and greater than an epoch. Example: The Tertiary period was the earliest period in the Cenozoic era and included & among others & the Eocene epoch.






15. A small ice sheet.






16. Uranus is named after the Roman god of the sky. It is the seventh planet from the Sun.






17. An instrument used to measure the speed of wind.






18. The perpendicular or very steep descent of a stream.






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






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






21. 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.






22. The portion of the continental margin that extends as a gently sloping surface from the shoreline seaward to a marked change in slope at the top of the continental slope . Seaward depth averages about 130 m.






23. The persistence of wind-formed waves after wind ceases.






24. Imaginary lines on a map or globe that measure distance in degrees east or west of the prime meridian. Longitude lines extend vertically & from pole to pole on a globe.






25. 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.






26. Gases that can be dissociated by solar radiation & which releases chlorine & which in turn destroys ozone.

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27. A measure of the strength of an earthquake based on the amount of movement recorded by a seismograph . compare Richter scale.






28. Any porous and permeable rock that yields oil or natural gas.






29. The southern portion of the late Paleozoic supercontinent known as Pangea. It means & literally 'Land of the Gonds' (a people of the Indian subcontinent).The supercontinent existed from Cambrian to Jurassic time & mainly composed of South America &






30. A flood that rises and falls very rapidly.






31. 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.






32. A planetary satellite.






33. A guide to reading a map that typically contains distance scales & arrows indicating direction & and/or explanations of symbols used.






34. The outermost part of the core. It is liquid & about 1 &700 km thick & and separated from the inner & solid core by a transition zone about 565 km thick.






35. 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.






36. The chronological sequence of units of Earth time.






37. A building that contains one or more telescopes.






38. A region of high heat flow on the Earth's surface & thought to lie above a mantle plume .






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






40. A comet that passed Earth in 1997 and won't return to the inner solar system until the year 4377.






41. A coral reef attached directly to the mainland.






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






43. Gases that can be dissociated by solar radiation & which releases chlorine & which in turn destroys ozone.

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






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






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






47. The symbol used on a map to indicate directions & both cardinal and ordinal.






48. A hydrocarbon (coal or petroleum) that can be extracted from the Earth for use as a fuel. Fossil fuels are non-renewable energy sources.






49. 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.






50. The initial point within the Earth that ruptures in an earthquake & directly below the epicenter. The point within the Earth which is the center of an earthquake & at which strain energy is first released and converted to elastic wave energy.