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






2. The line separating land and water.






3. The point on the Earth's surface directly above the focus of an earthquake.






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






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






6. Deposits of wind-borne dust.






7. A wall built out from the shore & usually at perpendicular to it to trap sand carried by longshore currents .






8. A small & dust-bearing whirlwind.






9. Named after the Roman god of the sea. It is the eighth planet from the Sun.






10. Living in water.






11. Of or relating to or containing basalt & a dark & dense & extrusive rock that has a silica content of 40% to 50% and makes up most of the ocean floor.






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






13. Sediment formed by chemical precipitation from water. Example: halite precipitated as the result of the evaporation of sea water.






14. The closest star to Earth besides the sun. It is approximately 4 light years away.






15. The breaking away of ice from the front of the glacier when it ends in a lake or an ocean. Produces icebergs.






16. The great circle on the Earth's surface passing through The North and South Poles & which is considered 0 degrees longitude. The prime meridian passes through Greenwich & England & and is used as a reference point for measuring longitude east and w






17. The area bordering a stream over which water spreads when the stream tops its channel banks.






18. 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.






19. The distance between two successive wave crests or troughs.






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






21. The transformation of a soil from a solid to a liquid state as the result of increased pore pressure.






22. Glacial deposits laid down directly by glaciers or laid down in lakes & ocean & or streams as result of glacial activity.






23. Soil conditions prevailing in area whose mean annual temperature is 0o C.






24. The geologic eon lying between the Archean and Phanerozoic eons & beginning about 2.5 billion years ago and ending about 0.57 billion years ago.






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






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






27. The amount of dissolved salt in water.






28. 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.






29. A measure of the strength of an earthquake based on the amount of movement recorded by a seismograph . compare Richter scale.






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






31. 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






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






33. A soft compact calcite & CaCO3 & with varying amounts of silica & quartz & feldspar & or other mineral impurities & generally gray-white or yellow-white and derived chiefly from fossil seashells.






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






35. A measure of the strength of an earthquake based on the amount of movement recorded by a seismograph . compare Richter scale.






36. A blanket of wind-driven sand with an upper surface about a meter above ground level.






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






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






39. The area bordering a stream over which water spreads when the stream tops its channel banks.






40. A natural depression in the surface of the land caused by the collapse of the roof of a cavern or subterranean passage & generally occurring in limestone regions.






41. A type of disintegration in which jointed rock is forced apart by the expansion of water as it freezes in fractures.






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






43. A thick layer of soil.






44. 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.






45. The transformation of a soil from a solid to a liquid state as the result of increased pore pressure.






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






47. A mass of ice & formed by the recrystallization of snow & that flows forward & or has flowed at some time in the past.






48. Ratio between weight of given volume of material and weight of equal volume of pure water.






49. A rock that has crystallized from a molten state.






50. 1. A mass of sand & gravel & or alluvium deposited on the bed of a stream & sea & or lake & or at the mouth of a stream 2. A unit of pressure & approximately equal to atmospheric pressure at sea level.