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






2. 10^2 nm 10^7 nm






3. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this






4. Mercury






5. The part of the Milky way that has on-going star formation






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






7. Where is the center of the expansion






8. Why does the earth have few craters while the moon has many?






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






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






11. A word meaning 'the same everywhere throughout.'






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






13. A star that blows itself apart






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






15. A plot of star absolute magnitude verses spectral type.






16. The part of the Milky way that has on-going star formation






17. The oldest terrain on the moon






18. A particle of light






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






20. The Big Bang says that the universe has not existed forever. It had a distinct beginning about 14 billion years ago called the 'Big Bang'. Therefore light from any object more than 14 billion light years away has not had time to reach us. The other p

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21. Radiation given off by electrons accelerating in a magnetic field






22. 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.






23. The sinking of denser elements to the center of a young molten planet






24. Mercury and venus






25. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites






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






27. Centered on the sun.






28. The apparent path of the Sun through the stars on the celestial sphere.






29. 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.






30. The shadow area behind the Earth or Moon where the Sun is completely obscured.






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






32. Mercury






33. An element of a highly efficient - two-dimensional electronic light detector






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






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






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






37. The mirror that determines the focus configuration of a reflector






38. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy






39. A collection of galaxies like the one the Milky Way belongs to






40. A small and dim but hot star.






41. A term referring to Jupiter-like planets






42. The rock that makes up the lunar maria






43. What are the three possible geometries of the universe?






44. Is space infinitely large?

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45. A streak of light in the atmosphere






46. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder






47. 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






48. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.






49. The rate of expansion of the universe.






50. A planet orbiting about a distant star