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 particle of light






2. The location in an H-are diagram of a star cluster - where stars have just left the main sequence. Used to estimate the cluster age.






3. Jupiter






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






5. Sc galaxies






6. The north-south line passing directly overhead through the zenith.






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






8. VENUS






9. A bright area of higher temperature that often proceeds the formation of sunspots.






10. Saturn






11. Matter that reveals itself only through its gravitational attraction






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






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






14. The mass of an object divided by its volume






15. The movement of the Earth's crustal plates riding on top of the mantle.






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






17. A push or a pull






18. The apparent backward motion of a planet against the background of stars.






19. The area behind a lens where images are resolved






20. 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






21. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape






22. A galaxy emitting large amounts of energy at long wavelengths.






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






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






25. That which is responsible for Jupiter's magnetic field






26. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.






27. 1 mm 1μm






28. When the Sun is farthest south of the celestial equator (About December 22)






29. 10 nm 10^2 nm






30. Very center of galaxy. suggestion of a black hole






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






32. 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






33. Either Io -Europa - Ganymede - or Callisto






34. Ganymede and Titan






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






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






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






38. A spectrum of light with energy at only a few wavelengths.






39. A prominence seen against the disk of the sun






40. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder






41. Heavier elements such as iron - silicon - magnesium - sulfer - nickel






42. An energetic event taking place in the early universe






43. A change in the wavelength of light caused by a motion between the observer and light (or wave) source (blue shift if getting closer - red shift if moving away)






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






45. Ancient stream channels - flood planes - and sedimentary-type rock. Frozen water is found in the polar ice caps and in the soil.






46. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:






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






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






49. Very center of galaxy. suggestion of a black hole






50. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object