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. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






2. The law that syas light energy from a blackbody increases as (temperature^4)






3. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation






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






5. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape






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






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






8. Centered on the sun.






9. An energetic event taking place in the early universe






10. 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






11. Possible Fates of the Universe






12. A star that is burning hydrogen to helium in a shell surrounding it's core






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






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






15. What do we think the actual fate of the universe will be and why do we think this?






16. Clouds of low density gas often found glowing faintly on either side of an AGN.






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






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






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






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






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






22. When the Moon entirely blocks the Sun.






23. The science of measuring light energy by wavelength.






24. The rock that makes up the lunar highlands






25. The rate of expansion of the universe.






26. A small spherical dark nebula






27. 100 nm 10 nm






28. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:






29. The point directly overhead.






30. The surface of the sun






31. The layer of the sun just above the photosphere






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






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






34. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.






35. Why does the earth have few craters while the moon has many?






36. 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)






37. Collections of young - hot stars






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






39. How is the Hubble Law consistent with an expanding universe?






40. 10 nm 10^2 nm






41. The oldest part of the Milky Way






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






43. Centered on the Earth






44. Collections of young - hot stars






45. Ancient stream channels - flood planes - and sedimentary-type rock. Frozen water is found in the polar ice caps and in the soil.






46. A star that erratically and explosively brightens and dims






47. The number of protons in an atom.






48. Comglomerates of ice and rock that orbit the sun in highly elliptical paths






49. 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.






50. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)