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






2. An area in which a large number of windmills have been erected to generate electrical power.






3. (Latin- Sol & Greek- Helios)the closest star to Earth. It is a giant ball of gas without any solid surface.






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






5. A planetary satellite.






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






7. 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.






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






9. A volcano that is composed of alternating layers of lava and pyroclastic material & along with abundant dikes and sills. Viscous & intermediate lava may flow from a central vent. Example: Mt. Fuji in Japan.






10. Flat land covered with tall grass and wildflowers.






11. The attractive force between two objects; its magnitude depends on their masses and the distance between them.






12. The average weather conditions of an area over many years & as measured by temperature & wind speed & and precipitation.






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






14. A device containing a free-swinging magnetic needle that is attracted to Earth's magnetic North Pole. Used to determine direction of travel.






15. Saturn is named after the Roman god of the harvest. It is the sixth planet from the Sun.






16. The formation & advance and retreat of glaciers and the results of these activities.






17. An eruption of lava that takes place from a fracture & usually without producing a cone.






18. A giant structure that contains hundreds of billions of stars.






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






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






21. A giant structure that contains hundreds of billions of stars.






22. Refers to rock or sediments made up primarily of broken fragments of pre-existing rocks or minerals.






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






24. Any seismic wave that travels through the body of Earth & rather than along its surface.






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






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






27. The weak or 'soft' zone in the upper mantle just below the lithosphere & involved in plate movement and isostatic adjustments. It lies 70 to 100 km below the surface and may extend to a depth of 400 km.






28. 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.






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






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






31. The process of one plate descending beneath another.






32. A naturally occurring inorganic solid that has a well-defined chemical composition and in which atoms are arranged in an ordered fashion.






33. 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.






34. The amount of material a stream carries in suspension.






35. The portion of the continental margin that lies between the abyssal plain and the continental slope. The continental rise is underlain by crustal rocks of the ocean basin.






36. The perpendicular or very steep descent of a stream.






37. Verifying assessments made from satellite data by doing direct & 'on-the ground' measurements.






38. No identifiable layers of minerals in a rock sample






39. A plate boundary in which plates on opposite sides of the boundary move past each other in opposite directions. The San Andreas fault of California is a good example.






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






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






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






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






44. A curved belt of volcanic islands lying above a subduction zone.






45. A steep-sided rounded extrusion of highly viscous lava squeezed out from a volcano and forming a dome-shaped or bulbous mass above and around the volcanic vent. The structure generally develops inside a volcanic crater.






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






47. Turbulent stream water flow down a steep gradient & but not as steep as in a waterfall.






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






49. A rigid segment of the Earth's lithosphere that moves horizontally and adjoins other plates along zones of seismic activity. Plates may include portions of both continents and ocean basins.






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






Can you answer 50 questions in 15 minutes?



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