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. A substance that produces negatively charged hydroxide ions ( OH- ) in water and reacts with acids to form salts.






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






3. An abandoned meander .






4. Till deposited from main body of glacier during ablation.






5. A rock changed from its original form and/or composition by heat & pressure &shearing stress & or chemically active fluids & or some combination of them.






6. Any of various minerals prized for beauty & durability & and rarity. A few noncrystalline materials of organic origin (e.g. & pearl & red coral & and amber) also are classified as gemstones.






7. Water that flows across watersheds during and immediately after severe rainstorms. In populated areas & stormwater runoff is often water that cannot be handled by existing sewer systems. Stormwater runoff is the leading source of water pollution in t






8. The resistance of a mineral to scratching & as measured by the Mohs scale.






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






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






11. 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.






12. 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.






13. A sedimentary rock made up of chemical sediments. Example: rock salt.






14. A substance that produces negatively charged hydroxide ions ( OH- ) in water and reacts with acids to form salts.






15. A natural open space underground & large enough for a person to enter. Most commonly occur by the dissolution of soluble rocks & generally limestone.






16. A group of islands; an expanse of water with scattered islands.






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






18. The average weather conditions of an area over many years & as measured by temperature & wind speed & and precipitation.






19. The chronological sequence of units of Earth time.






20. Glacial deposits laid down directly by glaciers or laid down in lakes & ocean & or streams as result of glacial activity.






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






22. The average weather conditions of an area over many years & as measured by temperature & wind speed & and precipitation.






23. A chuck of rock or dust in space.






24. 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.






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






26. 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.






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






28. An individual grain or constituent of a rock.






29. Any place where bedrock is visible on the surface of the Earth.






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






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






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






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






34. To change back and forth uncertainly.






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






36. A commonly used scale of earthquake intensity.






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






38. Mountains & characterized by extensive folding and thrust faulting & that form at convergent plate boundaries on continents.






39. Open pit mining & typically for coal.






40. A spring whose temperature is 6.5o C or more above mean annual air temperature.






41. The peak flow of water that tops the banks of a stream channel.






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






43. A continuous well-defined mass of material of sufficient ore content to make extraction economically feasible. compare mineral deposit.






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






45. A supercontinent that existed from the Jurassic to Early Tertiary after splitting from Pangea; composed of Laurentia & Baltica & Avalonia & (modern North America & Scandinavia & Greenland & Western and Central Europe); eventually fragmented into Eur






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






47. Any solid material that has settled out of a state of suspension in liquid.






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






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






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