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. The layer of the sun just above the photosphere






2. 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






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






4. Jupiter






5. The name for the only seriously considered theory of the universe.






6. A star that blows itself apart






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






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






9. Any change in the speed or direction of an object's motion






10. Venus (retrograde)






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






12. Any class of objects with a uniform luminosity used to determine distance.






13. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.

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14. Hydrogen and helium (mainly)






15. 100 nm 10 nm






16. Mercury and venus






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






18. The seasonal shifting of a nearby star's position relative to more distant objects.






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






20. Any class of objects with a uniform luminosity used to determine distance.






21. A small and dim but hot star.






22. 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






23. A massive variable star used to find distances to the galaxies or clusters that contain them.






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






25. The dimming of starlight by intervening dust






26. Where is the center of the expansion






27. Jupiter - Saturn - Uranus - Neptune






28. A particle of light






29. Clouds of low density gas often found glowing faintly on either side of an AGN.






30. The distance light travels in one year (=9.46x10^12km).






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






32. What is the universe expanding into?






33. A star fusing hydrogen to helium in it's core






34. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE






35. The oldest part of the Milky Way






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






37. The fusion process that turns three helium nuclei into a carbon nucleus






38. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy






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






40. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker






41. Infinitely long -> 10 cm






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






43. A small spherical dark nebula






44. The layer of the sun just above the photosphere






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






46. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






47. The process responsible for creating the arms of flocculent spiral galaxies






48. The rotation period of the Earth measured relative to the Sun.






49. The place in the sky that the Earth's axis points toward (can be either north or south)






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