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. When material is heated and moves taking the heat energy with it






2. What is the universe expanding into?






3. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.






4. 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.






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






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






7. Earth






8. A small and dim but hot star.






9. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.






10. Collections of young - hot stars






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






12. Large nebula consisting of very cold gas and dust






13. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.






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






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






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






17. The slow wobble of the Earth on its rotation axis.






18. Either Io -Europa - Ganymede - or Callisto






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






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






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






22. The high- temperatature outer layer of the sun






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






24. 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






25. The temp at which a substance in the vacuum of space solidifies






26. The law that describes the blackbody curve - and let to quantum mechanics.

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






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






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






30. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy






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






32. 1 mm 1μm






33. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






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






35. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas






36. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.






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






38. A faint - remarkably uniform distribution of radiation in space






39. The most mass a white dwarf can have before collapsing to a neutron star






40. The surface of the sun






41. First accurately measured the speed of light in a vacuum






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






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






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






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






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






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






48. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes






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






50. A word meaning 'the same in all directions.'