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 wavelengths where a specific element can absorb or emit light.






2. Europa






3. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.






4. A volume of space where few - if any - galaxies are located






5. Venus (retrograde)






6. 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)






7. Centered on the sun.






8. 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)






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






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






11. A crystalline patter found in iron meteorites






12. Wave- only waves cause an interference pattern when passing through a double slit - particle- only particles deposit energy at specific locations (the way an image builds up on digital camera)






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






14. Is there water on the moon?






15. 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






16. The lens in a telescope used to determine the magnification






17. Jupiter






18. 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






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






20. Mercury






21. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE






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






23. The force of attraction between any two objects having mass






24. Light scattered through the atmosphere that degrades astronomical images






25. A star that blows itself apart






26. Infinitely long -> 10 cm






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






28. All possible types of energy that can be emitted and absorbed by atoms.






29. 10 nm 10^2 nm






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






31. A particle of light.






32. VENUS






33. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies






34. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.






35. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)






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






37. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)






38. The location around an atom where an electron resides.






39. A spectrum of light with energy at only a few wavelengths.






40. Is space infinitely large?

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41. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals






42. The relation that tells how light dims with distance.






43. 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)






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






45. The place in the sky that the Earth's axis points toward (can be either north or south)






46. The mix of pure photon energy that emerged at the start of the universe.






47. A planet orbiting about a distant star






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






49. Jupiter - Saturn - Uranus - Neptune






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







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