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 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.






2. A ridge of high water associated with a hurricane and which floods over the shore .






3. The uprush of a wave onto the beach followed by the return flow of the water down the beach slope in the intervals between waves.






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






5. The precipitation that runs directly off the surface to stream or body of standing water.






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






7. Turbulent stream water flow down a steep gradient & but not as steep as in a waterfall.






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






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






10. A broad & mound-like mass of glacier ice that usually spreads radially outward from a central zone.






11. A disease-causing organism or entity & such as a bacterium or virus.






12. To preserve & or to avoid wasteful use.






13. Mercury is named after the Roman messenger of the gods. It is the closest to the Sun.






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






15. The direction & north (normal) or south (reversed) & that a magnetic compass needle points.






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






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






18. A cavity in a lava & formed by the entrapment of a gas bubble during solidification of the lava.






19. A process of land degradation initiated by human activity & particularly in the zones along the margins of deserts.






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






21. A wall built out from the shore & usually at perpendicular to it to trap sand carried by longshore currents .






22. The sum of the processes that result in the wearing away or the progressive lowering of the Earth's surface by weathering & erosion & mass wasting & and transportation.






23. An era of geologic time lasting from 570 to 245 million years ago.






24. A depression in the ground formed by the melting of a block of glacier ice buried or partially buried by drift.






25. Mars is named after the Roman god of war. It is the fourth planet from the Sun.






26. A system involving continuous interaction of the solid Earth & the atmosphere & the oceans and living things.






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






28. The weak or 'soft' zone in the upper mantle just below the lithosphere & involved in plate movement and isostatic adjustments. It lies 70 to 100 km below the surface and may extend to a depth of 400 km.






29. Property possessed by certain rocks of breaking with relative ease along parallel planes or nearly parallel surfaces in their crystal structures where the bonds are weakest.






30. A building that contains one or more telescopes.






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






32. 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.






33. To change back and forth uncertainly.






34. 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.






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






36. 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.






37. The level of light that penetrates through water.






38. 1. A steep-walled & usually conical depression at the summit or on the flanks of a volcano & resulting from the explosive ejection of material from a vent. 2. A bowl-shaped depression with a raised & overturned rim produced by the impact of a meteori






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






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






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






42. Enormous & thick sheets of rock that are part of the Earth's upper mantle that move and adjoin each other along zones of seismic activity. Many tectonic plates extend underneath both continents and sea floor.






43. A volcanic mountain on the seafloor. If flat-topped & it is a guyot.






44. A glaciated valley now flooded by the sea.






45. An icicle-shaped accumulation of dripstone hanging from cave roof.






46. A broad & mound-like mass of glacier ice that usually spreads radially outward from a central zone.






47. A collection of maps.






48. A delta formed at both sides of a tidal inlet.






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






50. The speed at which water flows.