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 'edge' of the universe. Light beyond this has not reached us yet.






2. 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.






3. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)






4. When material is heated and moves taking the heat energy with it






5. A galaxy emitting large amounts of energy at long wavelengths.






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






7. The mirror that gathers the light in a reflector






8. Centered on the Earth






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






10. Venus (retrograde)






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






12. 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)






13. 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)






14. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process






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






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






17. A prominence seen against the disk of the sun






18. A star fusing hydrogen to helium in it's core






19. Venus






20. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.






21. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas






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






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






24. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.






25. 100 nm 10 nm






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






27. The rock that makes up the lunar maria






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






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






30. The mass of an object divided by its volume






31. When the Moon entirely blocks the Sun.






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






33. Electromagnetic Radiation






34. The location in an H-are diagram of a star cluster - where stars have just left the main sequence. Used to estimate the cluster age.






35. A star that erratically and explosively brightens and dims






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






37. 100 nm 10 nm






38. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






39. The relation that tells how light dims with distance.






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






41. A repeated - periodic push or pull capable of summing into a larger push or pull






42. 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.






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






44. The era when the ratio of matter to energy greatly favored matter. (verses radiation dominated universe where it was opaque. Matter is now dominated by gravity not photons)






45. Large nebula consisting of very cold gas and dust






46. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.






47. 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.






48. 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






49. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth






50. The source of the force that is accelerating the expansion rate of the universe.