Test your basic knowledge |

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. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.






2. Jupiter






3. The name for the only seriously considered theory of the universe.






4. Where is the center of the expansion






5. The light produced when particles from the sun collide with atmospheric molecules






6. A word used in astronomy to describe all elements besides hydrogen and helium






7. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use






8. A faint - remarkably uniform distribution of radiation in space






9. 1. We see rapid movements or high energy radiation coming at some level from the nuclei of nearly every galaxy we have looked at. 2. We suspect that the creation of these supermassive black holes is part of the galaxy formation process.






10. Small moons that maintain the shape of rings around Saturn and Uranus






11. 1 mm 1μm






12. The amount an image is enlarged by a telescope






13. Dying large-mass stars lose their outer layers in a violent explosion creating large - chaotic remnants. these brighten like nova but are so much brighter and only occur ONCE PER STAR






14. An energetic event taking place in the early universe






15. A star without enough mass to begin hydrogen fusion






16. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)






17. 10^2 nm 10^7 nm






18. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






19. A location on an H-are Diagram where evolving stars pulsate






20. Radiation (possibly left over from the big bang) that fills the universe. Perfect black body spectrum and tells us a bit aout how galaxies are formed.






21. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)






22. Norhern lowlands- darker in color and have far fewer craters as if an ancient sea or ice field covered them. southern highlands- much higher in density of craters.






23. A measure of the ability of a telescope to see fine detail






24. Ganymede and Titan






25. Long - meandering cliff formed when a planet surface cools and shrinks






26. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.

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27. A small spherical dark nebula






28. A small chunk of rock in space






29. How is the Hubble Law consistent with an expanding universe?






30. The apparent backward motion of a planet against the background of stars.






31. A change in the appearance of the sun at the edge of the solar disk






32. A term referring to Earth-like planets






33. A long-lived high-pressure bulge in Jupiter's southern hemisphere






34. The shadow behind the Earth or Moon where the Sun is partially obscured.






35. Where is the center of the expansion






36. VENUS






37. A particle of light






38. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.






39. A crystalline patter found in iron meteorites






40. A rock or iron specimen that has fallen from space






41. A toroidal or donut-shaped collection of material attracted to a central body like a star or black hole. Dust around an object






42. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






43. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.






44. The name for the only seriously considered theory of the universe.






45. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.






46. A distance measure determined by the shifting of a star against the background sky every 6 months.






47. The rate of expansion of the universe.






48. A huge sphere of tenuous gas surrounding the nucleus of a comet






49. The equation that describes how matter equates with energy






50. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging