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 sinking of denser elements to the center of a young molten planet






2. When the Sun moves from south to north across the celestial equator (about March 21)






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






4. 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.






5. The science of measuring light energy by wavelength.






6. 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)






7. An element of a highly efficient - two-dimensional electronic light detector






8. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc






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






10. The apparent backward motion of a planet against the background of stars.






11. The point directly overhead.






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






13. The north-south line passing directly overhead through the zenith.






14. The place in the sky that the Earth's axis points toward (can be either north or south)






15. Large nebula consisting of very cold gas and dust






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






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






18. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes






19. The gap etween saturn's A and B rings






20. 100 nm 10 nm






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






22. 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)






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






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






25. The mirror that gathers the light in a reflector






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






27. A streak of light in the atmosphere






28. Venus






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






30. Light scattered through the atmosphere that degrades astronomical images






31. A particle of light






32. The imaginary sphere centered on the Earth that hols the stars.






33. The imaginary sphere centered on the Earth that hols the stars.






34. Population 1- similar to the sun and 2% of elements are metal - Population 2- formed before gas was metal- only a fraction of mass is metal.






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






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






37. The universe is isotropic - homogeneous - and without beginning or end in time and space. If the universe is truly homogeneous then every line of sight will eventually end on a galaxy. If it has existed forever then there has been enough time for lig

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38. The first rock-sized bodies that formed in the solar nebula from dust grains






39. The final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.






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






41. An empirical scheme for predictin ghe orbital distances of planets






42. Why do Galaxies move very rapidly in the interiors of the dense clusters?






43. 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:






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






45. The high- temperatature outer layer of the sun






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






47. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant






48. The universe is isotropic - homogeneous - and without beginning or end in time and space. If the universe is truly homogeneous then every line of sight will eventually end on a galaxy. If it has existed forever then there has been enough time for lig

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49. The material from which the solar system formed






50. Matter so dense that even light cannot escape its gravity