Test your basic knowledge |

Subject : science
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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 entity from which the whole universe is postulated to have come from.






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






3. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






4. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core






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






6. 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.






7. The displacement of spectral lines to redder colors caused by the expansion of the universe.






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






9. A huge sphere of tenuous gas surrounding the nucleus of a comet






10. The law stating that hotter blackbodies look bluer than cooler blackbodies.

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11. A term referring to Earth-like planets






12. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.






13. All possible types of energy that can be emitted and absorbed by atoms.






14. A small chunk of rock in space






15. Small moons that maintain the shape of rings around Saturn and Uranus






16. The projection of the Earth's equator onto the celestial sphere.






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






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






19. The location of a supermassive black hole






20. A star without enough mass to begin hydrogen fusion






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






22. A volume of space where few - if any - galaxies are located






23. A collection of galaxies like the one the Milky Way belongs to






24. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.






25. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






26. The law that predicts the possible types of spectra.

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27. 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.






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






29. What Ole Roemer used to measure the speed of light in a vacuum






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






31. The point in its orbit where a planet is farthest from the sun






32. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this






33. A perfect absorber and radiator of electromagnetic radiation.






34. Moon in less than the angular diameter of the Sun.






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






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






37. 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.






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






39. 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






40. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)






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






42. The oldest grouping of stars - found in the galaxy halo






43. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






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






45. VENUS






46. Earth






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






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






49. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.






50. The final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.







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