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. Venus






2. The process similar to conduction by which energy moves from the solar core to the convective layer






3. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.






4. The process that powers the sun and hydrogen bombs






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






6. 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






7. A term referring to the orbital character of stars near the Sun






8. A star without enough mass to begin hydrogen fusion






9. Neptune or uranus






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






11. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.






12. The science of measuring light energy by wavelength.






13. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.






14. A term referring to Earth-like planets






15. A star that erratically and explosively brightens and dims






16. 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)






17. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter






18. The displacement of spectral lines to redder colors caused by the expansion of the universe.






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






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






21. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging






22. The name for the only seriously considered theory of the universe.






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






24. The light produced when particles from the sun collide with atmospheric molecules






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






26. When particles are compressed to an unnatural state where their pressure is not related to their temperature






27. What causes the zones and belts on jupiter and saturn?






28. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






29. All wavelengths of light emitted by a blackbody.






30. The process of acquiring material






31. 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)






32. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting






33. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object






34. When one side of a body always faces the planet it revolves around






35. Collections of young - hot stars






36. The high- temperatature outer layer of the sun






37. A perfect absorber and radiator of electromagnetic radiation.






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






39. Radiation given off by electrons accelerating in a magnetic field






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






41. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)






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






43. The source of the force that is accelerating the expansion rate of the universe.






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






45. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.






46. A prominence seen against the disk of the sun






47. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids






48. The rate of expansion of the universe.






49. A quantity measuring the stability of the Earth's atmosphere






50. A distance measure determined by the shifting of a star against the background sky every 6 months.