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






2. Material that shoots rapidly out into space. Flares cause Auroras






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






4. 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.






5. 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)






6. 1 mm 1μm






7. 10^2 nm 10^7 nm






8. VENUS






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






10. A term referring to Earth-like planets






11. Half of the longest diameter across an ellipse






12. IO






13. Ganymede






14. The number of protons in an atom.






15. Titan






16. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies






17. The distance a moon can be from a planet before shattering from tidal forces






18. The layer of the sun just above the photosphere






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






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






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






22. Ganymede and Titan






23. The point in its orbit where a planet is nearest the sun






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






25. A point in the sky where meteors appear to come from during a shower






26. Jupiter






27. The apparent magnitude a star would have if it were at a distance of 10 parsecs.






28. Is space infinitely large?

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29. A distance measure determined by the shifting of a star against the background sky every 6 months.






30. Material that shoots rapidly out into space. Flares cause Auroras






31. An entity that is likely in the nucleus of most - if not all - galaxies.






32. A high-pressure bulge in Neptune's southern hemisphere






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






34. Form honeycomb like patterns surrounding empty or nearly empty voids.






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






36. Radiation (possibly left over from the big bang) that fills the universe. Perfect black body spectrum and tells us a bit aout how galaxies are formed.






37. Light scattered through the atmosphere that degrades astronomical images






38. The study of the universe as a whole.






39. 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






40. Ganymede






41. A prominence seen against the disk of the sun






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






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






44. A word meaning 'the same everywhere throughout.'






45. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)






46. The measure of a variable star's apparent magnitude as it brightens and dims with time






47. The entity from which the whole universe is postulated to have come from.






48. The law that syas light energy from a blackbody increases as (temperature^4)






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






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