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 ball of ice and dust & whose orbit is a long & narrow ellipse.






2. Any natural concentration of a valuable material in the Earth's crust & whether that material can be extracted profitably or not.






3. The naturally occurring material from which a mineral or minerals of economic value can be extracted at a profit.






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






5. Geologic time expressed in years before the present.






6. 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.






7. A major drainage divide separating the drainage to one ocean from another.






8. The pattern of water circulation from the ocean to the atmosphere to the land and back to the ocean.






9. The concept of a sequence of events involving the formation & alteration & destruction and reformation of rocks as a result of geologic processes.






10. A vent in the surface of the Earth & from which lava & ash & and gases erupt.






11. A planetary satellite.






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






13. A slide involving a downward and usually sudden movement of newly detached segments of bedrock sliding or slipping over an inclined surface of weakness such as a bedding plane & fault plane & or joint surface.






14. The sudden fall of one or more large pieces of a rock from a cliff.






15. Any object that revolves around another object in space.






16. A division of geologic time next smaller than the eon and larger than a period. Example: The Paleozoic era is in the Phanerozoic eon and includes & among others & the Devonian period.






17. 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.






18. A sea level change due to change in load on Earth's crust.






19. A low & nearly flat accumulation of sediment deposited at the mouth of a river or stream & commonly triangular or fan-shaped.






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






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






22. To change back and forth uncertainly.






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






24. The zone below the zone of aeration in which all pore spaces are filled with water.






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






26. A type of thermal spring which ejects water intermittently with considerable force.






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






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






29. A flood that rises and falls very rapidly.






30. A sedimentary rock composed of combustible matter derived from the partial decomposition of plant material.






31. The process of one plate descending beneath another.






32. The line separating land and water.






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






34. Highly mafic igneous volcanic rock & typically fine-grained and dark in color; rough volcanic equivalent of gabbro. Basalt is the most abundant volcanic rock in the Earth's crust.






35. The galaxy where Earth is located.






36. A vertical conduit through the Earth's crust below a volcano & through Which magma has passed.






37. A building that contains one or more telescopes.






38. Weathering processes that are the result of chemical reactions. Example: the transformation of orthoclase to kaolinite.






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






40. 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.






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






42. A thick layer of soil.






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






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






45. Formed when an organism is flattened (compressed) and a thin film of organic material from its body is left in the rock.






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






47. Rock formed from the accumulation of sediment & Which may consist of fragments and mineral grains of varying sizes from pre-existing rocks & remains or products of animals and plants & the products of chemical action & or mixtures of these.






48. The most recent eon of geologic time beginning 570 million years ago and continuing to the present.






49. 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.






50. An instrument that merely indicates the occurrence of an earthquake.