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 law stating that hotter blackbodies look bluer than cooler blackbodies.

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






3. Moon in less than the angular diameter of the Sun.






4. 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)






5. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE






6. A star that blows itself apart






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






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






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






10. IO






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






12. An energetic event taking place in the early universe






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






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






15. The crust of a meteorite caused by its entry into Earth's atmosphere






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






17. The part of the Milky way that has on-going star formation






18. Approximate speed of light in a vacuum






19. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula






20. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.






21. 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






22. 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 _____.






23. Saturn






24. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.






25. Orbit in Jupiters orbit






26. Distance from sun to nucleus- 8 kiloparsecs (26000 LY) - diameter of Milky way- 150000 LY - length for sun to orbit once around milky way- 250 million years






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






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






29. The lens in a telescope used to determine the magnification






30. Any class of objects with a uniform luminosity used to determine distance.






31. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.






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






33. A spinning neutron star






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






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






36. Orbit in Jupiters orbit






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






38. 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)






39. A term referring to Earth-like planets






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






41. A volume of space where few - if any - galaxies are located






42. A word used in astronomy to describe all elements besides hydrogen and helium






43. A spread of light with an uninterrupted wavelength distribution of energy.






44. When the Moon entirely blocks the Sun.






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






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






47. An entity that is likely in the nucleus of most - if not all - galaxies.






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






49. The crust of a meteorite caused by its entry into Earth's atmosphere






50. The mirror that determines the focus configuration of a reflector