Test your basic knowledge |

Subject : science
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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 law that syas light energy from a blackbody increases as (temperature^4)






2. 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






3. The oldest part of the Milky Way






4. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE






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






6. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.






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






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






9. A fusion process in which protons build together to form helium






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






11. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE






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






13. A method of finding a star's distance from its absolute magnitude and spectral type or color.






14. Collections of young - hot stars






15. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth






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






17. The high- temperatature outer layer of the sun






18. A perfect absorber and radiator of electromagnetic radiation.






19. A small and dim but hot star.






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






21. 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)






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






23. All wavelengths of light emitted by a blackbody.






24. A telescope that uses lenses to focus light






25. The amount an image is enlarged by a telescope






26. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.






27. The oldest terrain on the moon






28. A point in the sky where meteors appear to come from during a shower






29. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.






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






31. A telescope that uses lenses to focus light






32. 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)






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






34. A star that erratically and explosively brightens and dims






35. All wavelengths of light emitted by a blackbody.






36. 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.






37. The average distance between the Earth and the Sun (=1.5 x10^8km)






38. A force exerted by reflecting sunlight






39. Mercury






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






41. A push or a pull






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






43. The dimming of starlight by intervening dust






44. The most mass a white dwarf can have before collapsing to a neutron star






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






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






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






48. A location on an H-are Diagram where evolving stars pulsate






49. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.






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







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