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. The apparent magnitude a star would have if it were at a distance of 10 parsecs.






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






3. A measure of the force of gravity on an object






4. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)






5. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.






6. Hydrogen and helium (mainly)






7. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant






8. The location in the Milky Way where stars orbit like a solid wheel






9. 100 nm 10 nm






10. A small spherical dark nebula






11. 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






12. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






13. The elementary building blocks from which protons and neutrons are formed.






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






15. A prominence seen against the disk of the sun






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

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17. The relation that tells how light dims with distance.






18. The area behind a lens where images are resolved






19. 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 ________.






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






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






22. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






23. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy






24. 10^2 nm 10^7 nm






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






26. 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.






27. A planet that is closer to the sun than the earth






28. Possible Fates of the Universe






29. Mercury






30. The powdered stone fragments that make up the lunar 'soil'






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






32. A high-pressure bulge in Neptune's southern hemisphere






33. Venus






34. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






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






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






37. Infinitely long -> 10 cm






38. The mirror that determines the focus configuration of a reflector






39. The lens that gathers the light in a refractor






40. 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






41. Hot cells of gas that rise and fall in the hotosphere






42. Neptune or uranus






43. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas






44. 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.






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






46. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process






47. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






48. 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.






49. The number of protons in an atom.






50. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)