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 glaciated valley now flooded by the sea.






2. 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.






3. The process of removing metal from ore.






4. 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






5. The point on the Earth's surface that is directly above the focus of an earthquake.






6. Objects revolving around the sun that are too small and too numerous to be considered planets.






7. The condition of equilibrium & comparable to floating & of units of the lithosphere above the asthenosphere.






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






9. Occurs at the intersection of the water table with the ground surface.






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






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






12. 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.






13. The portion of the continental margin that extends as a gently sloping surface from the shoreline seaward to a marked change in slope at the top of the continental slope . Seaward depth averages about 130 m.






14. The level of light that penetrates through water.






15. Bent rock strata.






16. The two days of the year on which neither hemisphere is tilted toward or away from the sun.






17. 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.






18. A stone or boulder & glacially transported from place of origin and left in an area of different bedrock composition.






19. Containing moisture.






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






21. (Latin- Sol & Greek- Helios)the closest star to Earth. It is a giant ball of gas without any solid surface.






22. The effect of water and carbon dioxide absorbing outgoing infrared radiation & raising a system's temperature. The term is generally used with reference to the Earth's temperature & although it can also be applied to other systems & such as greenhous






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






24. 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.






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






26. A large area with common features that set it apart from other areas.






27. Pertaining to or composed of granite & a coarse-grained igneous rock dominated by light-colored minerals & consisting of about 50 percent orthoclase & 25 percent quartz & and balance of feldspars and ferromagnesian silicates. Granite is commonly foun






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






29. The point on the Earth's surface directly above the focus of an earthquake.






30. 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.






31. 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.






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






33. A landscape that develops from the action of ground water in areas of easily soluble rocks. It is usually characterized by caves & underground drainage and sinkholes.






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






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






36. The processes of weathering by which physical actions such as frost wedging break down a rock into fragments & involving no chemical change.






37. No identifiable layers of minerals in a rock sample






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






39. Imaginary lines on a map or globe that measure distance in degrees east or west of the prime meridian. Longitude lines extend vertically & from pole to pole on a globe.






40. The relationship between distances in the area being mapped and distances in the map itself.






41. Lies half way between the north and south magnetic poles.






42. The internal resistance to flow in a liquid.






43. A device built to study distant objects by making them appear closer.






44. A portable time keeper with a mechanism for ensuring accuracy and adjusting itself & used for determining longitude at sea.






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






46. Deep steep-sided depression in the ocean floor caused by the subduction of oceanic crust beneath either other oceanic crust or continental crust.






47. A plate boundary in which plates on opposite sides of the boundary move past each other in opposite directions. The San Andreas fault of California is a good example.






48. (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.






49. The remains of an extremely massive star pulled into a small volume by the force of gravity.






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