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 science of measuring light energy by wavelength.






2. Electromagnetic Radiation






3. A crystalline patter found in iron meteorites






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






5. 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.






6. 1. We see rapid movements or high energy radiation coming at some level from the nuclei of nearly every galaxy we have looked at. 2. We suspect that the creation of these supermassive black holes is part of the galaxy formation process.






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






8. The location in the Milky Way where stars orbit like a solid wheel






9. Matter that reveals itself only through its gravitational attraction






10. The mix of pure photon energy that emerged at the start of the universe.






11. Venus






12. Titan






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






14. 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






15. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)






16. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.






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






18. 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)






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






20. Infinitely long -> 10 cm






21. A telescope that uses lenses to focus light






22. The family of radiant energy that includes light as a subset






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






24. Mercury






25. Moon in less than the angular diameter of the Sun.






26. A small and dim but hot star.






27. When a planet lines up with the sun inthe sky






28. Then the Sun moves from north to south across the celestial equator (about September 23)






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






30. 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






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






32. The final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.






33. The process responsible for creating the arms of flocculent spiral galaxies






34. The distance between a lens and its focal plane






35. 100 nm 10 nm






36. 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)






37. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.

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38. Centered on the sun.






39. Clouds of low density gas often found glowing faintly on either side of an AGN.






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






41. Loops that trace the magnetic field as it erupts from a sunspot area and arches over to an adjacent area. They glow in the light of gas pouring out of corona and falling into photosphere.






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






43. The lowest energy of an atom.






44. A very dense - highly populated cluster of galaxies






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






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






47. Population 1- similar to the sun and 2% of elements are metal - Population 2- formed before gas was metal- only a fraction of mass is metal.






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






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






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