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 mudflow composed chiefly of pyroclastic material on the flanks of a volcano.






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






3. A small & dust-bearing whirlwind.






4. An instrument that detects & magnifies & and records vibrations of the Earth & especially earthquakes.






5. All of space and everything in it.






6. Mercury is named after the Roman messenger of the gods. It is the closest to the Sun.






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






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






9. The symbol used on a map to indicate directions & both cardinal and ordinal.






10. A group of islands; an expanse of water with scattered islands.






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






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






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






14. A layer of sedimentary rock; plural is strata.






15. 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 .






16. A portable time keeper with a mechanism for ensuring accuracy and adjusting itself & used for determining longitude at sea.






17. A chuck of rock or dust in space.






18. Where two plates are moving in opposite directions as in a mid-ocean ridge.






19. A small ice sheet.






20. The rock beneath the soil.






21. An icicle-shaped accumulation of dripstone hanging from cave roof.






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






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






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






25. An informal term to include all geologic time from the beginning of the Earth to the beginning of the Cambrian period 570 million years ago.






26. A Hawaiian term for a lava flow that has a rough & jagged surface.






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






28. Flat land covered with tall grass and wildflowers.






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






30. A ridge of high water associated with a hurricane and which floods over the shore .






31. The low spot between two successive waves.






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






33. Gases (primarily water and carbon dioxide & but also a variety of sulfur and nitrogen compounds and gaseous hydrocarbons) that trap the Sun's heat in the atmosphere.






34. A waterway from open ocean into a lagoon.






35. A low & nearly flat accumulation of sediment deposited at the mouth of a river or stream & commonly triangular or fan-shaped.






36. Where one plate slides beneath another plate as the two are pushed together & a subduction zone.






37. The two days of the year on which the noon sun is directly overhead at either 23.5






38. Either the northern or southern half of the Earth as divided by the equator & or the eastern or western half as divided by a meridian.






39. The rise and fall of sea level caused by the gravitational pull of the Sun and Moon on the Earth.






40. The most recent eon of geologic time beginning 570 million years ago and continuing to the present.






41. 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






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






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






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






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






46. A hydrocarbon (coal or petroleum) that can be extracted from the Earth for use as a fuel. Fossil fuels are non-renewable energy sources.






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






48. A detailed mathematical description of the cause-and-effect relationships between events that can be used to predict or explain other such events.






49. A sea level change due to change in load on Earth's crust.






50. A delta formed at both sides of a tidal inlet.