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 spectrum of light with energy at only a few wavelengths.






2. The lens that gathers the light in a refractor






3. A star without enough mass to begin hydrogen fusion






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






5. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.






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






7. 10^2 nm 10^7 nm






8. 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






9. The cosmological principle is the assumption that the universe is isotropic and homogeneous.The Big Bang assumes it to be a correct principle so that what we observe is exactly like What is too far away to be observed.






10. The mass of an object divided by its volume






11. A measure of the force of gravity on an object






12. Jupiter - Saturn - Uranus - Neptune






13. Matter that reveals itself only through its gravitational attraction.






14. The larger bodies that formed early in teh solar nebula that were chemically differentiated






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






16. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes






17. A word meaning 'the same in all directions.'






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






19. All wavelengths of light emitted by a blackbody.






20. The temp at which a substance in the vacuum of space solidifies






21. Large nebula consisting of very cold gas and dust






22. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.






23. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.






24. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






25. A star without enough mass to begin hydrogen fusion






26. 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






27. Comglomerates of ice and rock that orbit the sun in highly elliptical paths






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






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






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






31. 1μm 100 nm






32. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)






33. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)






34. The oldest grouping of stars - found in the galaxy halo






35. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.






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






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






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






39. A measure of the force of gravity on an object






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






41. A bridge of material held in position above the solar surface. They can remain for hours even days






42. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)






43. A word used in astronomy to describe all elements besides hydrogen and helium






44. When the Sun is farthest south of the celestial equator (About December 22)






45. Rich= dense crowded cores of galaxies - poor= few members and a looser organization of galaxies






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






47. A representation of the changes in color and brightness of an evolving protostar.






48. The rate of expansion of the universe.






49. First accurately measured the speed of light in a vacuum






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