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 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.






2. The uprush of a wave onto the beach followed by the return flow of the water down the beach slope in the intervals between waves.






3. The precipitation that runs directly off the surface to stream or body of standing water.






4. The way in which a rock or mineral breaks in random patterns rather than cleaving






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






6. 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.






7. A seismic body wave that involves particle motion & alternating compression and expansion & in the direction of wave propagation. It is the fastest seismic wave. compare S-wave .






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






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






10. 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.






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






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






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






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






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






16. 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.






17. (Greek-Aphrodite)named after the Roman goddess of love. It is the planet closest in size to Earth and the second planted from the Sun.






18. A period of dryness & that when prolonged & causes damage to crops; a shortage of water.






19. A coral reef separated from the mainland by a lagoon.






20. An accumulation of wind driven sand into a distinctive shape.






21. Produced as a wave steepens and falls forward as the wave nears the shore.






22. 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.






23. An ingredient in a food or other substance that nourishes or promotes growth.






24. A valley caused by extension of the Earth's crust. Its floor forms as a portion of the crust moves downward along normal faults.






25. Lava extruded beneath water characterized by pillow shapes.






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






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






28. The dust-sized & sharp-edged & glassy particles resulting from an explosive volcanic eruption.






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






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






31. To change back and forth uncertainly.






32. Deposits of wind-borne dust.






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






34. The chronological sequence of units of Earth time.






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






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






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






38. 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.






39. A narrow strip of land along the margin of the ocean extending inland for a variable distance from low water mark.






40. The galaxy where Earth is located.






41. The Earth's crust underlying the ocean basins which is formed at mid-oceanic ridges. It is typically 5 to 10 kilometers thick composed of basalt.






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






43. A sedimentary rock composed of combustible matter derived from the partial decomposition of plant material.






44. A large volume of dust-sized particles lifted high into the atmosphere.






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






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






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






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






49. The color of a mineral in its powdered form obtained from scraping a sample on a ceramic plate






50. The mass of an object divided by its volume.