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 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)






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






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. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu






5. In what chemical form are jupiters nitrogen - carbon and oxygen?






6. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.






7. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)






8. A particle of light.






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






10. The family of radiant energy that includes light as a subset






11. The rock that makes up the lunar highlands






12. The fusion process that turns three helium nuclei into a carbon nucleus






13. Orbit in Jupiters orbit






14. A small and dim but hot star.






15. 10^2 nm 10^7 nm






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






17. Population 1- similar to the sun and 2% of elements are metal - Population 2- formed before gas was metal- only a fraction of mass is metal.






18. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)






19. Venus






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. 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)






22. Earth






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






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






25. A force exerted by reflecting sunlight






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






27. A telescope that uses lenses to focus light






28. A particle of light






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






30. The seasonal shifting of a nearby star's position relative to more distant objects.






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






32. A particle of light






33. The oldest terrain on the moon






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






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

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






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






38. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE






39. A spread of light with an uninterrupted wavelength distribution of energy.






40. The entity responsible for spiral arms in grand-design spiral galaxies






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






42. When the Sun is farthest north of the celestial equator (about June 22)






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






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






45. 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)






46. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core






47. A quantity measuring the stability of the Earth's atmosphere






48. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)






49. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.






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