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






2. The process of removing metal from ore.






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






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






5. An individual grain or constituent of a rock.






6. A protective wall built offshore and usually parallel to the shore.






7. The tendency of a moving object to continue in a straight line or a stationary object to remain in place.






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






9. Sediment formed by chemical precipitation from water. Example: halite precipitated as the result of the evaporation of sea water.






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






11. Any form of water & such as rain & sleet & or snow & that falls to Earth's surface.






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






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






14. 1. Breach in a natural levee . 2. Deep crevice or open fracture in glacier ice.






15. The rock beneath the soil.






16. The speed at which water flows.






17. Pluto is named after the Roman god of the Underworld. No longer considered a planet.






18. Open pit mining & typically for coal.






19. Long narrow beaches separated in many places from the mainland by lagoons.






20. That portion of the resources for a valuable mineral commodity that can be extracted from the Earth at a profit today.






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






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






23. (Latin- Terra & Greek- Gaia) Earth is named after the ancient Germanic Goddess of the soil. It is the third planet from the Sun.






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






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






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






27. A general term for a relatively hard layer of soil at or just below the ground surface & cemented by silica & iron oxide & calcium carbonate & or organic matter.






28. The process by which building stone & usually in blocks or sheets & is extracted from the Earth. radiation -- (Electromagnetic radiation) -- energy that travels through space in the form of waves without the intervention of matter & as in the transp






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






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






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






32. Sediments produced directly by the life processes of plants or animals.






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






34. The process by which an unconsolidated deposit of sediments is converted in to solid rock.






35. 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.






36. A segment of an active fault zone that has not experienced a major earthquake during a time period when most other segments of the zone have. They are generally regarded as having a higher potential for future earthquakes.






37. 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.






38. An area where fresh water comes into contact with seawater & usually in a partly enclosed coastal body of water; a mix of fresh and salt water where the current of a stream meets the tides.






39. A permeable region of rock or soil through which ground water can move.






40. An area of land that delivers runoff water & sediment & and dissolved substances to surface water bodies & such as rivers or lakes. All watersheds consist of boundaries & a basin and collection areas.






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






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






43. A collection of maps.






44. Sediments produced directly by the life processes of plants or animals.






45. The reserves of a valuable mineral commodity plus all other mineral deposits that may eventually become available & even those that are presumed to exist but have not yet been discovered and those that are not economically or technologically exploita






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






47. A rock that has crystallized from a molten state.






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






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






50. The current geologic era & which began 66.4 million years ago and continues to the present.