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. Venus






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






3. A spinning neutron star






4. Light-colored high-pressure bands in Jupiter's atmosphere






5. A small and dim but hot star.






6. A particle of light






7. Is there water on the moon?






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






9. The law that describes the blackbody curve - and let to quantum mechanics.

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10. When particles are compressed to an unnatural state where their pressure is not related to their temperature






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






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






13. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction






14. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.






15. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.






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






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






18. The rotation of a star or planet at different speeds at its equator and poles






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






20. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation






21. A continuous spectrum of light missing energy at a few wave lengths.






22. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






23. 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)






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






25. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)






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






27. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.






28. The study of the universe as a whole.






29. 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)






30. An empirical scheme for predictin ghe orbital distances of planets






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






32. A star without enough mass to begin hydrogen fusion






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

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34. 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.






35. Matter that reveals itself only through its gravitational attraction






36. Ganymede






37. Very center of galaxy. suggestion of a black hole






38. Collections of young - hot stars






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






40. Earth






41. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the






42. A star that is in the process of forming. It glows from gravitational contraction






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






44. A galaxy sending out a stream of material from its nucleus






45. Material that shoots rapidly out into space. Flares cause Auroras






46. A term referring to Earth-like planets






47. The lens that gathers the light in a refractor






48. A large and bright but cool star.






49. 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






50. The slow wobble of the Earth on its rotation axis.