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 galaxy emitting large amounts of energy at long wavelengths.






2. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use






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






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






5. 1 mm 1μm






6. An important quality of telescopes that increases as the square of the primary mirror or objective lens






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






8. The light produced when particles from the sun collide with atmospheric molecules






9. The science of measuring the apparent magnitudes of stars by imaging them through different filters.






10. Why do Galaxies move very rapidly in the interiors of the dense clusters?






11. A prominence seen against the disk of the sun






12. The Big Bang says that the universe has not existed forever. It had a distinct beginning about 14 billion years ago called the 'Big Bang'. Therefore light from any object more than 14 billion light years away has not had time to reach us. The other p

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






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






15. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas






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






17. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids






18. The relation that tells how light dims with distance.






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






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






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






22. Ganymede






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






24. The surface of the sun






25. A star that is in the process of forming. It glows from gravitational contraction






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






27. A fusion process in which protons build together to form helium






28. A term referring to Earth-like planets






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






30. The apparent path of the Sun through the stars on the celestial sphere.






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






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






33. What are the three possible geometries of the universe?






34. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t






35. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density






36. Sc galaxies






37. 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.






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






39. A representation of the changes in color and brightness of an evolving protostar.






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






41. Light-colored high-pressure bands in Jupiter's atmosphere






42. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE






43. 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)






44. The process of acquiring material






45. The point directly overhead.






46. 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






47. A term referring to the orbital character of stars near the Sun






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






49. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)






50. 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.