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 pillar formed as a stalactite and stalagmite meet.






2. A thick layer of soil.






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






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






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






6. The very small particles of dirt & soot & and other pollutants that are present in the air.






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






8. The theory that states that the present-day continents are the fragmented pieces of preexisting larger landmasses called supercontinents.






9. A study designed to collect critical data to be used for comparison or as a control in a later study.






10. The process of one plate descending beneath another.






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






12. The way in which a rock or mineral breaks in random patterns rather than cleaving






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






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






15. The very small particles of dirt & soot & and other pollutants that are present in the air.






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






17. A minor tremor that precedes an earthquake. An increase in seismicity may signal that a major release of strain energy is about to occur.






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






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






20. Any form of water & such as rain & sleet & or snow & that falls to Earth's surface.






21. A hole or basin cut into bedrock of a stream by the abrasive action of pebbles and sand swirled by turbulent stream flow.






22. A large area of flat or nearly flat land.






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






24. 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.






25. The process by which an unconsolidated deposit of sediments is converted in to solid rock.






26. 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.






27. An area of land that delivers runoff water & sediment & and dissolved substances to surface water bodies & such as rivers or lakes. All watersheds consist of boundaries & a basin and collection areas.






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






29. Fossils formed when water containing minerals leaks into a mold. The minerals harden to form a copy of the original structure or organism.






30. The Sun with all the celestial bodies that revolve around it.






31. In the geologic time scale a unit of time less than an era and greater than an epoch. Example: The Tertiary period was the earliest period in the Cenozoic era and included & among others & the Eocene epoch.






32. A type of volcanic eruption characterized by nuees ardentes and the development of lava domes.






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






34. The chronological sequence of units of Earth time.






35. Any molten material that is extrusive or volcanic & or the rock that forms from a molten extrusive. Molten rock that flows at the Earth's surface.






36. 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.






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






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






39. A minor tremor that precedes an earthquake. An increase in seismicity may signal that a major release of strain energy is about to occur.






40. The current geologic era & which began 66.4 million years ago and continues to the present.






41. Elongated rises on the ocean floor where basalt periodically erupts & forming new oceanic crust.






42. 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.






43. A waterway from open ocean into a lagoon.






44. The surface between the zone of saturation and the zone of aeration.






45. The rigid outer shell of the Earth. It includes the crust and uppermost mantle and is on the order of 100 km in thickness.






46. A roughly circular reef with an occasional small & low & coral sand island surrounding a shallow lagoon.






47. The process by which building stone & usually in blocks or sheets & is extracted from the Earth. radiation -- (Electromagnetic radiation) -- energy that travels through space in the form of waves without the intervention of matter & as in the transp






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






49. A commonly used measure of earthquake magnitude & based on a logarithmic scale. Each integral step on the scale represents a tenfold increase in the extent of ground shaking & as recorded on a seismograph.






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