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. Hydrogen and helium (mainly)






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






3. Population 1- similar to the sun and 2% of elements are metal - Population 2- formed before gas was metal- only a fraction of mass is metal.






4. A prominence seen against the disk of the sun






5. 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






6. The location of a supermassive black hole






7. 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.






8. Jupiter






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






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






11. 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.






12. The Greek philosopher responsible for making the stellar magnitude scale.






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






14. Mercury






15. 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.






16. The equation that describes how matter equates with energy






17. Light scattered through the atmosphere that degrades astronomical images






18. A particle of light.






19. A younger cluster of stars - found in the galaxy disk






20. The particle horizon is the farthest we can see. It exists because the universe had a beginning and thus a definite age. Light from distances farther away from the particle horizon have not had time to reach us yet.






21. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.






22. Matter that reveals itself only through its gravitational attraction.






23. When the Moon entirely blocks 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. The average distance between the Earth and the Sun (=1.5 x10^8km)






26. Dark areas on the sun that are cooler than the surrounding photosphere






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






28. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.






29. A galaxy sending out a stream of material from its nucleus






30. 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)






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






32. VENUS






33. 1 mm 1μm






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






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






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






37. When the Sun is farthest north of the celestial equator (about June 22)






38. The amount an image is enlarged by a telescope






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






40. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.






41. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.






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






43. The high- temperatature outer layer of the sun






44. The area behind a lens where images are resolved






45. The larger bodies that formed early in teh solar nebula that were chemically differentiated






46. The mix of pure photon energy that emerged at the start of the universe.






47. The source of the force that is accelerating the expansion rate of the universe.






48. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)






49. A measure of the force of gravity on an object






50. A telescope that uses lenses to focus light






Can you answer 50 questions in 15 minutes?



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