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. The process responsible for creating the arms of flocculent spiral galaxies






2. All wavelengths of light emitted by a blackbody.






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






4. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






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






6. A continuous spectrum of light missing energy at a few wave lengths.






7. 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






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






9. A distance measure determined by the shifting of a star against the background sky every 6 months.






10. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker






11. An object that may remain after a star explodes






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






13. Why does the earth have few craters while the moon has many?






14. Either Io -Europa - Ganymede - or Callisto






15. Venus






16. A long-lived high-pressure bulge in Jupiter's southern hemisphere






17. Jupiter






18. Earth






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






20. The distance light travels in one year (=9.46x10^12km).






21. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie

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






23. The elementary building blocks from which protons and neutrons are formed.






24. 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






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






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






27. 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.






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. 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.






30. The gap inthe outer portion of Saturn's A ring






31. The layer of the sun just above the photosphere






32. Light scattered through the atmosphere that degrades astronomical images






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






34. Jupiter - Saturn - Uranus - Neptune






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






36. 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






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






38. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






39. A rock or iron specimen that has fallen from space






40. The sinking of denser elements to the center of a young molten planet






41. A change in the wavelength of light caused by a motion between the observer and light (or wave) source (blue shift if getting closer - red shift if moving away)






42. 10 cm -> 1 mm






43. Matter so dense that even light cannot escape its gravity






44. Jupiter - Saturn - Uranus - Neptune






45. The process similar to conduction by which energy moves from the solar core to the convective layer






46. Mercury






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






48. The act of removing an electron from an atom.






49. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.






50. That which is responsible for Jupiter's magnetic field