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






2. What is the universe expanding into?






3. The slow wobble of the Earth on its rotation axis.






4. Mercury and venus






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






6. A plot of star absolute magnitude verses spectral type.






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






8. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)






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






10. A planet orbiting about a distant star






11. Venus






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






13. Centered on the Earth






14. A term referring to the orbital character of stars near the Sun






15. The science of measuring the apparent magnitudes of stars by imaging them through different filters.






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






17. What Ole Roemer used to measure the speed of light in a vacuum






18. A perfect absorber and radiator of electromagnetic radiation.






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






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






21. The lens that gathers the light in a refractor






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






23. Collections of young - hot stars






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






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






26. The wavelengths where a specific element can absorb or emit light.






27. The area behind a lens where images are resolved






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






29. 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 _____.






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






31. The science of measuring light energy by wavelength.






32. The dimming of starlight by intervening dust






33. The rock that makes up the lunar highlands






34. When the Sun is farthest north of the celestial equator (about June 22)






35. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






36. The rotation period of the Earth measured relative to the stars.






37. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.






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






39. Mercury






40. A star that blows itself apart






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






42. 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.






43. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)






44. 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.






45. Light scattered through the atmosphere that degrades astronomical images






46. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast






47. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






48. The movement of the Earth's crustal plates riding on top of the mantle.






49. When a planet lines up with the sun inthe sky






50. 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