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






2. A flat & dry plain covered with short grass.






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






4. 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.






5. Molten rock & containing dissolved gases and suspended solid particles. At the Earth's surface & magma is known as lava.






6. 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.






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






8. 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






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






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






11. A deposit of partly decayed plant remains in a very wet environment; marsh or swamp deposit of plant remains containing more than 50 percent carbon.






12. A glaciated valley now flooded by the sea.






13. Any solid material that has settled out of a state of suspension in liquid.






14. 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.






15. A sedimentary rock composed primarily of biogenic sediments.






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






17. 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.






18. As applied to glacier ice & the process by which ice below the snow line is wasted by evaporation and melting.






19. A rock changed from its original form and/or composition by heat & pressure &shearing stress & or chemically active fluids & or some combination of them.






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






21. An imaginary circle around the earth that represents the halfway mark between the North and South Poles and establishes the boundary between the Northern and Southern Hemispheres.






22. A statement of relative age in layered rocks: In a series of sedimentary rocks that has not been overturned & the topmost layer is always the youngest and the bottommost layer is always the oldest.






23. The solid innermost part of the core with a diameter of a little over 1 &200 km.






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






25. 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.






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






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






28. The process of mountain building.






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






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






31. Lacking in rainfall & very dry.






32. Evidence in rock of the presence of past life & such as a dinosaur bone & an ancient clam shell & or the footprint of a long-extinct animal as well as life history artifacts.






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






34. A rock changed from its original form and/or composition by heat & pressure &shearing stress & or chemically active fluids & or some combination of them.






35. The first scientist to make systematic use of the telescope in looking at the heavens.






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






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






38. A small & dust-bearing whirlwind.






39. The straightening and/or deepening of a river channel.






40. A flat & dry plain covered with short grass.






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






42. A sharp bend & loop or turn in a stream's course. When abandoned & it is called a meander scar or an oxbow.






43. Bent rock strata.






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






45. 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.






46. An artificial hill formed by the debris of successive human settlements.






47. A measure of acidity.






48. Water beneath the Earth's surface.






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






50. A spring whose temperature is 6.5o C or more above mean annual air temperature.