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. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula






2. When one side of a body always faces the planet it revolves around






3. The high- temperatature outer layer of the sun






4. Jupiter






5. The oldest part of the Milky Way






6. 1. We see rapid movements or high energy radiation coming at some level from the nuclei of nearly every galaxy we have looked at. 2. We suspect that the creation of these supermassive black holes is part of the galaxy formation process.






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






8. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE






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






10. The surface of the sun






11. Is space infinitely large?

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12. The rock that makes up the lunar maria






13. How did Earth come to have an oxygen rich atmosphere?






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






15. A very dense - highly populated cluster of galaxies






16. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






17. 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.






18. 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)






19. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process






20. A location on an H-are Diagram where evolving stars pulsate






21. 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.






22. When massive objects bend space and time enough to create multiple images of an object located behind them






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






24. The rate of expansion of the universe.






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






26. A small chunk of rock in space






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






28. 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






29. The law that syas light energy from a blackbody increases as (temperature^4)






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






31. A planet orbiting about a distant star






32. The era when the ratio of matter to energy greatly favored matter. (verses radiation dominated universe where it was opaque. Matter is now dominated by gravity not photons)






33. The surface of the sun






34. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.






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






36. The amount an image is enlarged by a telescope






37. 1 mm 1μm






38. A term referring to Jupiter-like planets






39. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE






40. When massive objects bend space and time enough to create multiple images of an object located behind them






41. Ganymede and Titan






42. Comglomerates of ice and rock that orbit the sun in highly elliptical paths






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

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






45. Centered on the sun.






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






47. The science of measuring light energy by wavelength.






48. The number of protons in an atom.






49. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging






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