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. Jupiter - Saturn - Uranus - Neptune






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






3. 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)






4. Light-colored high-pressure bands in Jupiter's atmosphere






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






6. Rich= dense crowded cores of galaxies - poor= few members and a looser organization of galaxies






7. Mercury and venus






8. The law that describes the blackbody curve - and let to quantum mechanics.

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9. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast






10. That which is responsible for Jupiter's magnetic field






11. The oldest part of the Milky Way






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






13. A faint - remarkably uniform distribution of radiation in space






14. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






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






16. Mercury and venus






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






18. The organization of clusters of galaxies into sheets and strings






19. A crystalline patter found in iron meteorites






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






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






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






23. An energetic event taking place in the early universe






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






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






26. Dark - reddish - low-pressure bands in Jupiter's atmosphere






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






28. A star that is in the process of forming. It glows from gravitational contraction






29. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.






30. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy






31. 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 ________.






32. 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






33. A term referring to Earth-like planets






34. Distribution of dust (tells us disk is thin) - find distances to O&B stars and H2 regions (arms are sights of star formation and OB stars live and die at location of birth) -Milky way has four arms. Sun is in spur apart from arms.






35. The location of a supermassive black hole






36. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)






37. 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)






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






39. Mercury - Venus - Earth - Mars






40. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction






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






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






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






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






45. A star that erratically and explosively brightens and dims






46. A large and bright but cool star.






47. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the






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






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






50. The projection of the Earth's equator onto the celestial sphere.







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