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. Large nebula consisting of very cold gas and dust






2. The force of attraction between any two objects having mass






3. 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






4. 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.






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






6. 1μm 100 nm






7. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)






8. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)






9. The oldest part of the Milky Way






10. The material from which the solar system formed






11. Norhern lowlands- darker in color and have far fewer craters as if an ancient sea or ice field covered them. southern highlands- much higher in density of craters.






12. Jupiter






13. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto






14. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.






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






16. 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.






17. The average distance between the Earth and the Sun (=1.5 x10^8km)






18. The rock that makes up the lunar maria






19. Elliptical orbits that come inside orbit of the Earth.






20. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.






21. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






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






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






24. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)






25. Mercury






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






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






28. The universe is isotropic - homogeneous - and without beginning or end in time and space. If the universe is truly homogeneous then every line of sight will eventually end on a galaxy. If it has existed forever then there has been enough time for lig

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29. The rate of expansion of the universe.






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






31. Light scattered through the atmosphere that degrades astronomical images






32. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.






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






34. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.






35. A plot of star absolute magnitude verses spectral type.






36. The oldest part of the Milky Way






37. 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






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






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






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






41. The name for the only seriously considered theory of the universe.






42. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter






43. Hot cells of gas that rise and fall in the hotosphere






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






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






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






47. The number of protons in an atom.






48. A spinning neutron star






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






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







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