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. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)






2. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)






3. The Big Bang says that the universe has not existed forever. It had a distinct beginning about 14 billion years ago called the 'Big Bang'. Therefore light from any object more than 14 billion light years away has not had time to reach us. The other p

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4. 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.






5. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE






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






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






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






9. A spinning neutron star






10. A star that is burning hydrogen to helium in a shell surrounding it's core






11. A small and dim but hot star.






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






13. Electromagnetic Radiation






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






15. A planet that is closer to the sun than the earth






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






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






18. The high- temperatature outer layer of the sun






19. 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 ________.






20. Mercury






21. A prominence seen against the disk of the sun






22. A spinning neutron star






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






24. The imaginary sphere centered on the Earth that hols the stars.






25. A subatomic particle with a negative charge. It creates light.






26. When the Moon entirely blocks the Sun.






27. A particle of light.






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






29. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)






30. A continuous spectrum of light missing energy at a few wave lengths.






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






32. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.






33. A perfect absorber and radiator of electromagnetic radiation.






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






35. Dying large-mass stars lose their outer layers in a violent explosion creating large - chaotic remnants. these brighten like nova but are so much brighter and only occur ONCE PER STAR






36. The location around an atom where an electron resides.






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






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






39. Jupiter






40. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.






41. 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






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






43. The universe is isotropic - homogeneous - and without beginning or end in time and space. If the universe is truly homogeneous then every line of sight will eventually end on a galaxy. If it has existed forever then there has been enough time for lig

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44. 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 _____.






45. A star that erratically and explosively brightens and dims






46. Why do Galaxies move very rapidly in the interiors of the dense clusters?






47. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)






48. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)






49. The shadow area behind the Earth or Moon where the Sun is completely obscured.






50. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals







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