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 fusion process that turns three helium nuclei into a carbon nucleus






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






3. Mercury






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






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






6. Jupiter






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






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






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






10. A very dense - highly populated cluster of galaxies






11. The family of radiant energy that includes light as a subset






12. A two-filter measure of the color - and hence temperature - of a star.






13. Infinitely long -> 10 cm






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






15. 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 _____.






16. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere






17. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter






18. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)






19. A small spherical dark nebula






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






21. Matter that reveals itself only through its gravitational attraction.






22. Dark areas on the sun that are cooler than the surrounding photosphere






23. The dimming of starlight by intervening dust






24. Light-colored high-pressure bands in Jupiter's atmosphere






25. Sc galaxies






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






27. Venus






28. Then the Sun moves from north to south across the celestial equator (about September 23)






29. The point directly overhead.






30. The measure of a variable star's apparent magnitude as it brightens and dims with time






31. A particle of light






32. VENUS






33. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.






34. Is space infinitely large?


35. A logarithmically scaled value for the measured brightness of a star.






36. A small and dim but hot star.






37. Any change in the speed or direction of an object's motion






38. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)






39. A younger cluster of stars - found in the galaxy disk






40. The organization of clusters of galaxies into sheets and strings






41. The science of measuring light energy by wavelength.






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






43. A planet that is farther from the sun than the Earth is






44. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder






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






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






47. The displacement of spectral lines to redder colors caused by the expansion of the universe.






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






49. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting






50. A representation of the changes in color and brightness of an evolving protostar.