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 bridge of material held in position above the solar surface. They can remain for hours even days






2. A fusion process in which protons build together to form helium






3. 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






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






5. 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 _____.






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






7. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core






8. A rock or iron specimen that has fallen from space






9. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE






10. 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.






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






12. Light scattered through the atmosphere that degrades astronomical images






13. The law stating that hotter blackbodies look bluer than cooler blackbodies.

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






15. The science of measuring light energy by wavelength.






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. 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






18. The apparent path of the Sun through the stars on the celestial sphere.






19. An evolved star - past the helium flash that is burning helium to carbon in it's cores






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






21. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use






22. When the Sun is farthest north of the celestial equator (about June 22)






23. A small chunk of rock in space






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






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






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






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






28. The normal eastward movement of a planet against the background of hte distant stars.






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






30. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






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






32. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.






33. The point directly overhead.






34. A small chunk of rock in space






35. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.






36. Titan






37. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.






38. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






39. A change in the appearance of the sun at the edge of the solar disk






40. 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)






41. 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






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






43. The equation that describes how matter equates with energy






44. What Ole Roemer used to measure the speed of light in a vacuum






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






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






47. Poitns of gravitational stability in the orbit of a planet






48. The dimming of starlight by intervening dust






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






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