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. The production of living matter by organisms that make food using sunlight or chemicals. Usually expressed as grams of carbon per square meter per year.






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






3. The speed at which water flows.






4. The very slow & generally continuous downslope movement of soil and debris under the influence of gravity.






5. Any accumulation of material & by settling from water or air & chemical precipitation & evaporation from solution & etc.






6. 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






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






8. The top of a wave.






9. 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.






10. Deposits of wind-borne dust.






11. An earthquake that follows and has its epicenter near a larger earthquake.






12. The part of the crust that directly underlies the continents and continental shelves. Averages about 35 km in thickness & but may be over 70 km thick under largest mountain ranges.






13. The acidity in rain due to gases from internal combustion engines and coal- and oil-burning power plants.






14. 1. Breach in a natural levee . 2. Deep crevice or open fracture in glacier ice.






15. A supercontinent that existed from the the end of the Permian to the Jurassic & 300 to 200 million years ago & assembled from large continents like Euramerica & Gondwana & and Siberia & as well as smaller landmasses like the Cathaysian and Cimmerian






16. A substance that produces positively charged hydrogen ions (H+) when dissolved in water.






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






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






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






20. A worldwide change in sea level & such as caused by melting glaciers.






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






22. The primary division of geologic time which are & from oldest to youngest & the Hadean & Archean & Proterozoic & and Phanerozoic eons.






23. 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






24. 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






25. 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.






26. The rock beneath the soil.






27. Deserts in zones of descending air between 25 degrees and 30 degrees north and south latitude.






28. A small ice sheet.






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






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






31. The production of living matter by organisms that make food using sunlight or chemicals. Usually expressed as grams of carbon per square meter per year.






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






33. The outermost layer of the Earth & varying in thickness from about 10 kilometers (6 miles) below the oceans & to 65 kilometers (about 40 miles) below the continents; represents less than 1 percent of the Earth's volume.






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






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






36. Deposition of fine mineral particles (silt) on the beds of streams or lakes.






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






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






39. The presence of layers in some rocks caused by parallel alignment of minerals.






40. The part of the crust that directly underlies the continents and continental shelves. Averages about 35 km in thickness & but may be over 70 km thick under largest mountain ranges.






41. Bent rock strata.






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






43. 1. A low & bowl-shaped area of land surrounded by higher lands. 2. any large depression in which sediments are deposited.






44. Igneous. Antonym of intrusive. Synonym of volcanic. Pertaining to igneous rocks or features formed from lava released on the Earth's surface.






45. Banks of sand and silt along stream bank built by deposition in small increments during successive floods.






46. A protective wall built offshore and usually parallel to the shore.






47. A large amount of gas and dust in space & spread out in an immense volume.






48. 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






49. A sedimentary rock composed primarily of biogenic sediments.






50. Deposits of wind-borne dust.