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. A telescope that uses mirrors to focus light






2. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites






3. Hot cells of gas that rise and fall in the hotosphere






4. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.






5. Mercury






6. Venus






7. The entity responsible for spiral arms in grand-design spiral galaxies






8. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)






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






10. What are the three possible geometries of the universe?






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






12. The 'edge' of the universe. Light beyond this has not reached us yet.






13. A spinning neutron star






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






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






16. 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






17. The oldest part of the Milky Way






18. Then the Sun moves from north to south across the celestial equator (about September 23)






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






20. The process of acquiring material






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






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






23. The distance between a lens and its focal plane






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






25. A long-lived high-pressure bulge in Jupiter's southern hemisphere






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






27. 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.






28. 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






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






30. Is there water on the moon?






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






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






33. An object that may remain after a star explodes






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






35. The location in the Milky Way where stars orbit like a solid wheel






36. 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)






37. The telescope configuration that has the focus placed at the back of the primary mirror






38. A crystalline patter found in iron meteorites






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






40. A spinning neutron star






41. The rock that makes up the lunar highlands






42. When the Moon entirely blocks the Sun.






43. 100 nm 10 nm






44. The entity responsible for spiral arms in grand-design spiral galaxies






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






46. Is there water on the moon?






47. Long - meandering cliff formed when a planet surface cools and shrinks






48. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.






49. A phenomenon seen when the Earth passes through the orbit of a burned out comet






50. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)