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






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






3. A cyclical pattern of movement in a fluid body such as the ocean & the atmosphere & or the Earth's mantle & driven by density variations which in turn are the result of differences in temperature from one part of the fluid to another.






4. A coral reef attached directly to the mainland.






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






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






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






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






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






10. A collection of maps.






11. 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.






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






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






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






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






17. 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.






18. The line that separates one drainage basin from another.






19. The chronological sequence of units of Earth time.






20. A period of dryness & that when prolonged & causes damage to crops; a shortage of water.






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






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






23. The great circle on the Earth's surface passing through The North and South Poles & which is considered 0 degrees longitude. The prime meridian passes through Greenwich & England & and is used as a reference point for measuring longitude east and w






24. A measure of acidity.






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






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






27. A steep-sided rounded extrusion of highly viscous lava squeezed out from a volcano and forming a dome-shaped or bulbous mass above and around the volcanic vent. The structure generally develops inside a volcanic crater.






28. A process by which salts accumulate in soil.






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






30. All unconsolidated materials above bedrock. Natural earthy materials on the Earth's surface & in places modified or even made by human activity & containing living matter & and supporting or capable of supporting plants out of doors.






31. Iron & aluminum & magnesium & manganese & and titanium. Ores of the abundant metals only need to be 3 - 5 times as metal-rich as average rock.






32. A measure of acidity.






33. An era of time during the Phanerozoic eon lasting from 245 million years ago to 66.4 million ago.






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






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






36. Living parts of the environment that can renew or replace themselves.






37. An area subject to dust storms & especially south central United States .






38. An astronomical instrument for measuring angles & primarily altitude of celestial bodies to determine latitude.






39. To change back and forth uncertainly.






40. The green pigment in the cells of many plants that enables them to use sunlight to convert carbon dioxide and water into carbohydrates in the process called photosynthesis.






41. The closest star to Earth besides the sun. It is approximately 4 light years away.






42. A process of erosion in which wind carries off particles of dust and sand.






43. The breaking away of ice from the front of the glacier when it ends in a lake or an ocean. Produces icebergs.






44. The geologic eon lying between the Archean and Phanerozoic eons & beginning about 2.5 billion years ago and ending about 0.57 billion years ago.






45. Temporary accumulations of sediments that collect between low and high water marks.






46. A tool for measuring the relative clarity of water.






47. 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.






48. A soft compact calcite & CaCO3 & with varying amounts of silica & quartz & feldspar & or other mineral impurities & generally gray-white or yellow-white and derived chiefly from fossil seashells.






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






50. The principle that states the processes operating to change the Earth in the present also operated in the past.