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






2. Young clusters in disk are irregularly shaped since they have no time to relax into the rounder relaxed shape of globular clusters-will constantly be torn apart and assimilated.






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






4. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy






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






6. Any class of objects with a uniform luminosity used to determine distance.






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






8. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast






9. The most mass a white dwarf can have before collapsing to a neutron star






10. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation






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






12. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas






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






14. The distance between a lens and its focal plane






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






16. The oldest part of the Milky Way






17. The elementary building blocks from which protons and neutrons are formed.






18. The process of acquiring material






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






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






21. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






22. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






23. A planet orbiting about a distant star






24. 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)






25. The lowest energy of an atom.






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






27. The organization of clusters of galaxies into sheets and strings






28. 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)






29. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids






30. When the Sun moves from south to north across the celestial equator (about March 21)






31. 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






32. 10 nm 10^2 nm






33. Sc galaxies






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






35. Small moons that maintain the shape of rings around Saturn and Uranus






36. The wavelengths where a specific element can absorb or emit light.






37. What do we think the actual fate of the universe will be and why do we think this?






38. 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)






39. Possible Fates of the Universe






40. The gap etween saturn's A and B rings






41. The material from which the solar system formed






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






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






44. 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.






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






46. 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)






47. 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.






48. A particle of light.






49. Ganymede and Titan






50. The organization of clusters of galaxies into sheets and strings