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






2. Destruction of the ozone layer caused by the release of CFC's (chlorofluorocarbons) into the atmosphere which react chemically with ozone and break it down into different gases.






3. The process by which ocean floors spread laterally from crests of main ocean ridges. As material moves laterally from the ridge & new material replaces it along the ridge crest by welling upward from the mantle.






4. A roughly circular reef with an occasional small & low & coral sand island surrounding a shallow lagoon.






5. A seismic body wave that involves particle motion & alternating compression and expansion & in the direction of wave propagation. It is the fastest seismic wave. compare S-wave .






6. The vertical distance between the crest and adjacent trough of a wave.






7. The process by which a binding & or cementing & agent is precipitated in spaces among individual particles of a deposit. Common cementing agents are calcite & quartz & and dolomite.






8. The naturally occurring material from which a mineral or minerals of economic value can be extracted at a profit.






9. Where one plate slides beneath another plate as the two are pushed together & a subduction zone.






10. That part of the continental margin that lies between the continental shelf and the continental rise. Slope relatively steep & 3o - 6o. The continental slope is underlain by crustal rocks of the continent.






11. The way in which a rock or mineral breaks in random patterns rather than cleaving






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






13. The point on the Earth's surface where a magnetic needle points vertically downward (north magnetic pole) or vertically upward (south magnetic pole).






14. A dense & hot (sometimes incandescent) cloud of volcanic ash and gas produced in a Pelean eruption.






15. 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.






16. (Greek-Aphrodite)named after the Roman goddess of love. It is the planet closest in size to Earth and the second planted from the Sun.






17. The most recent eon of geologic time beginning 570 million years ago and continuing to the present.






18. A sharp bend & loop or turn in a stream's course. When abandoned & it is called a meander scar or an oxbow.






19. A term applied to large areas of basaltic lava presumably extruded from fissures.






20. A substance that produces positively charged hydrogen ions (H+) when dissolved in water.






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






22. A Hawaiian term for a lava flow that has a rough & jagged surface.






23. A roughly circular reef with an occasional small & low & coral sand island surrounding a shallow lagoon.






24. A type of disintegration in which jointed rock is forced apart by the expansion of water as it freezes in fractures.






25. Deposits of wind-borne dust.






26. The area immediately below the ground surface within which pore spaces are partially filled with water and partially filled with air.






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






28. The attractive force between two objects; its magnitude depends on their masses and the distance between them.






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






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






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






32. The closest galaxy to the Milky way. It is approximately 2 million light-years away.






33. Verifying assessments made from satellite data by doing direct & 'on-the ground' measurements.






34. An accumulation of wind driven sand into a distinctive shape.






35. The line formed by the intersection of the axial plane of a fold with a bedding plane & marking where the bed shows its maximum curvature.






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






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






38. A building that contains one or more telescopes.






39. The process of mountain building.






40. Named after the Roman god of the sea. It is the eighth planet from the Sun.






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






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






43. A unit of length used in sea navigation based on the length of 1 minute of arc on a great circle. On Earth & 1 minute of latitude.






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






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






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






47. A group of stars that appear to make a pattern in the sky. The Big Dipper is a constellation.






48. Woodland that usually gets at least 100 inches of rain each year.






49. Living in water.






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







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