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 highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)






2. Jupiter






3. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object






4. Half of the longest diameter across an ellipse






5. The amount an image is enlarged by a telescope






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






7. A subatomic particle with a negative charge. It creates light.






8. A small and dim but hot star.






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






10. A very dense - highly populated cluster of galaxies






11. A term referring to the orbital character of stars near the Sun






12. A change in the appearance of the sun at the edge of the solar disk






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






14. The oldest part of the Milky Way






15. The rock that makes up the lunar maria






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






17. A telescope that uses lenses to focus light






18. What Ole Roemer used to measure the speed of light in a vacuum






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






20. The measure of a variable star's apparent magnitude as it brightens and dims with time






21. Long - meandering cliff formed when a planet surface cools and shrinks






22. A streak of light in the atmosphere






23. Mercury






24. The average distance between the Earth and the Sun (=1.5 x10^8km)






25. The layer of the sun just above the photosphere






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






27. A large and bright but cool star.






28. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula






29. Hot cells of gas that rise and fall in the hotosphere






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






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






32. The point in its orbit where a planet is nearest the sun






33. A spinning neutron star






34. 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.






35. A perfect absorber and radiator of electromagnetic radiation.






36. The high- temperatature outer layer of the sun






37. Dying large-mass stars lose their outer layers in a violent explosion creating large - chaotic remnants. these brighten like nova but are so much brighter and only occur ONCE PER STAR






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






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






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






41. Mercury






42. Either Io -Europa - Ganymede - or Callisto






43. 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)






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






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






46. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie

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






48. Sc galaxies






49. An object that may remain after a star explodes






50. The universe is isotropic - homogeneous - and without beginning or end in time and space. If the universe is truly homogeneous then every line of sight will eventually end on a galaxy. If it has existed forever then there has been enough time for lig

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