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 huge sphere of tenuous gas surrounding the nucleus of a comet






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






3. Earth






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






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






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






7. Wave- only waves cause an interference pattern when passing through a double slit - particle- only particles deposit energy at specific locations (the way an image builds up on digital camera)






8. A small and dim but hot star.






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






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






11. 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






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






13. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.






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

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15. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this






16. The location of a supermassive black hole






17. The process of acquiring material






18. 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






19. Young clusters in disk are irregularly shaped since they have no time to relax into the rounder relaxed shape of globular clusters-will constantly be torn apart and assimilated.






20. 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)






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






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






23. Venus






24. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)






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






26. 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






27. Jupiter






28. A prominence seen against the disk of the sun






29. The layer of the sun just above the photosphere






30. The oldest terrain on the moon






31. When a planet lines up with the sun inthe sky






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






33. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)






34. The elementary building blocks from which protons and neutrons are formed.






35. Jupiter - Saturn - Uranus - Neptune






36. Centered on the Earth






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






38. How is the Hubble Law consistent with an expanding universe?






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






40. A particle of light






41. A term referring to Jupiter-like planets






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






43. Ganymede and Titan






44. The shadow behind the Earth or Moon where the Sun is partially obscured.






45. A small chunk of rock in space






46. The rotation of a star or planet at different speeds at its equator and poles






47. 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)






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






49. 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.






50. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant







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