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. 10^2 nm 10^7 nm






2. The mirror that determines the focus configuration of a reflector






3. A toroidal or donut-shaped collection of material attracted to a central body like a star or black hole. Dust around an object






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






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






6. The apparent magnitude a star would have if it were at a distance of 10 parsecs.






7. A small round distribution of gas surrounding a dying star






8. 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.






9. Where is the center of the expansion






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

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11. 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






12. Dark - reddish - low-pressure bands in Jupiter's atmosphere






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






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






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






16. When a planet lines up with the sun inthe sky






17. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






18. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes






19. Half of the longest diameter across an ellipse






20. Mercury






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






22. 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






23. Is there water on the moon?






24. A younger cluster of stars - found in the galaxy disk






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






26. 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.






27. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder






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






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






30. A phenomenon seen when the Earth passes through the orbit of a burned out comet






31. The crust of a meteorite caused by its entry into Earth's atmosphere






32. The process of acquiring material






33. A logarithmically scaled value for the measured brightness of a star.






34. The study of the universe as a whole.






35. Centered on the Earth






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






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






38. A word meaning 'the same everywhere throughout.'






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






40. A change in the appearance of the sun at the edge of the solar disk






41. A telescope that uses mirrors to focus light






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






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






44. Radiation (possibly left over from the big bang) that fills the universe. Perfect black body spectrum and tells us a bit aout how galaxies are formed.






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






46. Titan






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






48. Titan






49. Half of the longest diameter across an ellipse






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

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