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 star that is burning hydrogen to helium in a shell surrounding it's core






2. VENUS






3. A term referring to Jupiter-like planets






4. 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 _____.






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






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






7. 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






8. The layer of the sun just above the photosphere






9. The north-south line passing directly overhead through the zenith.






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






11. 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)






12. The process of acquiring material






13. 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.






14. A two-filter measure of the color - and hence temperature - of a star.






15. The telescope configuration that has the focus placed at the back of the primary mirror






16. Venus (retrograde)






17. Saturn






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






19. The organization of clusters of galaxies into sheets and strings






20. Is there water on the moon?






21. The process that powers the sun and hydrogen bombs






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






23. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)






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






25. The rock that makes up the lunar maria






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






27. The first rock-sized bodies that formed in the solar nebula from dust grains






28. Long - meandering cliff formed when a planet surface cools and shrinks






29. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.






30. Poitns of gravitational stability in the orbit of a planet






31. Hydrogen and helium (mainly)






32. Collections of young - hot stars






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






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






36. The location in the Milky Way where stars orbit like a solid wheel






37. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.






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






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






40. The shadow behind the Earth or Moon where the Sun is partially obscured.






41. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.

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42. VENUS






43. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting






44. When the Sun moves from south to north across the celestial equator (about March 21)






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






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






47. 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






48. A method of finding a star's distance from its absolute magnitude and spectral type or color.






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






50. Mercury