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. Till deposited from main body of glacier during ablation.






2. 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.






3. 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.






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






5. A collection of maps.






6. 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.






7. 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.






8. Surficial mining & in which the valuable rock is exposed by removal of overlying rock or soil.






9. An era of time during the Phanerozoic eon lasting from 245 million years ago to 66.4 million ago.






10. 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.






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






12. A broad & mound-like mass of glacier ice that usually spreads radially outward from a central zone.






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






14. 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.






15. A system involving continuous interaction of the solid Earth & the atmosphere & the oceans and living things.






16. The galaxy where Earth is located.






17. That portion of the Earth below the crust and reaching to about 2 &780 km & where a transition zone of about 100 km thickness separates it from the core.






18. A sedimentary rock made up of chemical sediments. Example: rock salt.






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






20. A large ridge or mound-like structure within a body of water that is built by calcareous organisms such as corals & red algae & and bivalves.






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






22. The level of light that penetrates through water.






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






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






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






26. He area from which a stream and its tributaries receives its water.






27. A waste material that contaminates air & water & or soil.






28. Pertaining to clastic material formed by volcanic explosion or aerial expulsion from a volcanic vent.






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






30. The processes (mechanical and chemical) responsible for the wearing away & loosening & and dissolving of materials of the Earth's crust.






31. An isolated & steep-sided & rocky mass or island just offshore from a rocky headland & usually on a shore platform.






32. The physical & chemical & and biological processes by which rock at or near the Earth's surface is broken down into smaller pieces.






33. Forms along a coast as wave erosion cuts through a headland.






34. A valley carved by glacier erosion and whose cross-valley profile has steep sides and a nearly flat floor & suggestive of a large letter 'you'.






35. Mountains & characterized by extensive folding and thrust faulting & that form at convergent plate boundaries on continents.






36. Flat land covered with tall grass and wildflowers.






37. A substance that produces negatively charged hydroxide ions ( OH- ) in water and reacts with acids to form salts.






38. 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.






39. 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.






40. A lake in an abandoned meander.






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






42. A pillar formed as a stalactite and stalagmite meet.






43. A molecule composed of three atoms of oxygen and mostly found in the stratosphere. Though beneficial in the upper atmosphere & at ground level & ozone is called photochemical smog & and is a respiratory irritant and considered a pollutant.






44. A planetary satellite.






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






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






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






48. 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.






49. To change back and forth uncertainly.






50. An abandoned meander .