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 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)






2. The Greek philosopher responsible for making the stellar magnitude scale.






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






4. A term referring to Earth-like planets






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






6. All wavelengths of light emitted by a blackbody.






7. 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)






8. 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)






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






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






11. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)






12. The distance a moon can be from a planet before shattering from tidal forces






13. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE






14. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)






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






16. 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)






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






18. A change in the wavelength of light caused by a motion between the observer and light (or wave) source (blue shift if getting closer - red shift if moving away)






19. Is there water on the moon?






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






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






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






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






24. First accurately measured the speed of light in a vacuum






25. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites






26. The process responsible for creating the arms of flocculent spiral galaxies






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






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






29. The point in its orbit where a planet is nearest the sun






30. 10 nm 10^2 nm






31. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation






32. Mercury - Venus - Earth - Mars






33. The act of removing an electron from an atom.






34. Jupiter






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






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






37. Collections of young - hot stars






38. A particle of light






39. The oldest part of the Milky Way






40. 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)






41. Ganymede






42. 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)






43. Half of the longest diameter across an ellipse






44. A spinning neutron star






45. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)






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






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






48. Centered on the sun.






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






50. VENUS







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