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. When particles are compressed to an unnatural state where their pressure is not related to their temperature






2. 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)






3. Form honeycomb like patterns surrounding empty or nearly empty voids.






4. A bright area of higher temperature that often proceeds the formation of sunspots.






5. Venus






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






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






8. Mercury and venus






9. What is the universe expanding into?






10. Earth






11. A volume of space where few - if any - galaxies are located






12. The location in an H-are diagram of a star cluster - where stars have just left the main sequence. Used to estimate the cluster age.






13. The layer of the sun just above the photosphere






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






15. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy






16. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu






17. 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






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






19. In what chemical form are jupiters nitrogen - carbon and oxygen?






20. The law that describes the blackbody curve - and let to quantum mechanics.

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






22. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)






23. The distance light travels in one year (=9.46x10^12km).






24. Jupiter






25. A particle of light






26. Jupiter






27. The fusion process that turns three helium nuclei into a carbon nucleus






28. 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)






29. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






30. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.






31. Jupiter






32. The oldest grouping of stars - found in the galaxy halo






33. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE






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






35. Matter so dense that even light cannot escape its gravity






36. Jupiter - Saturn - Uranus - Neptune






37. The entity responsible for spiral arms in grand-design spiral galaxies






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






39. Mercury






40. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula






41. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.






42. When one side of a body always faces the planet it revolves around






43. The seasonal shifting of a nearby star's position relative to more distant objects.






44. The apparent path of the Sun through the stars on the celestial sphere.






45. A collection of galaxies like the one the Milky Way belongs to






46. 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 ________.






47. Heavier elements such as iron - silicon - magnesium - sulfer - nickel






48. VENUS






49. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)






50. The telescope configuration that has the focus placed at the back of the primary mirror