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. First accurately measured the speed of light in a vacuum






2. A star that is burning hydrogen to helium in a shell surrounding it's core






3. A phenomenon seen when the Earth passes through the orbit of a burned out comet






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






5. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)






6. When the Sun moves from south to north across the celestial equator (about March 21)






7. Venus






8. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.






9. Jupiter - Saturn - Uranus - Neptune






10. Ganymede






11. The high- temperatature outer layer of the sun






12. A star that is burning hydrogen to helium in a shell surrounding it's core






13. Material that shoots rapidly out into space. Flares cause Auroras






14. The Big Bang says that the universe has not existed forever. It had a distinct beginning about 14 billion years ago called the 'Big Bang'. Therefore light from any object more than 14 billion light years away has not had time to reach us. The other p

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15. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes






16. Approximate speed of light in a vacuum






17. A spinning neutron star






18. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals






19. 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.






20. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






21. A galaxy sending out a stream of material from its nucleus






22. The distance between a lens and its focal plane






23. The layer of the sun just above the photosphere






24. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation






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






26. A star that is in the process of forming. It glows from gravitational contraction






27. When material is heated and moves taking the heat energy with it






28. The shadow area behind the Earth or Moon where the Sun is completely obscured.






29. 10 cm -> 1 mm






30. The rotation period of the Earth measured relative to the Sun.






31. The Big Bang says that the universe has not existed forever. It had a distinct beginning about 14 billion years ago called the 'Big Bang'. Therefore light from any object more than 14 billion light years away has not had time to reach us. The other p

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32. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density






33. The imaginary sphere centered on the Earth that hols the stars.






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






35. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t






36. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core






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






38. Distance from sun to nucleus- 8 kiloparsecs (26000 LY) - diameter of Milky way- 150000 LY - length for sun to orbit once around milky way- 250 million years






39. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.






40. The law that predicts the possible types of spectra.

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41. A star that is in the process of forming. It glows from gravitational contraction






42. Comglomerates of ice and rock that orbit the sun in highly elliptical paths






43. Either Io -Europa - Ganymede - or Callisto






44. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.






45. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.






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






47. The larger bodies that formed early in teh solar nebula that were chemically differentiated






48. A planet orbiting about a distant star






49. Moon in less than the angular diameter of the Sun.






50. 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)