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. Matter so dense that even light cannot escape its gravity






2. When the Sun is farthest north of the celestial equator (about June 22)






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






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






5. The oldest terrain on the moon






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






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






8. How is the Hubble Law consistent with an expanding universe?






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






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






11. The rotation period of the Earth measured relative to the stars.






12. The first rock-sized bodies that formed in the solar nebula from dust grains






13. The mass of an object divided by its volume






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






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






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






17. 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.






18. 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.






19. A term referring to Jupiter-like planets






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






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






22. The study of the universe as a whole.






23. The shadow behind the Earth or Moon where the Sun is partially obscured.






24. 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






25. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






26. The surface of the sun






27. Material that shoots rapidly out into space. Flares cause Auroras






28. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu






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






30. The dark - relativley smooth areas on the moon; Latin for sea






31. A distance measure determined by the shifting of a star against the background sky every 6 months.






32. The distance light travels in one year (=9.46x10^12km).






33. A bright area of higher temperature that often proceeds the formation of sunspots.






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






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






36. Distribution of dust (tells us disk is thin) - find distances to O&B stars and H2 regions (arms are sights of star formation and OB stars live and die at location of birth) -Milky way has four arms. Sun is in spur apart from arms.






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






38. How is the Hubble Law consistent with an expanding universe?






39. Venus






40. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes






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






42. The normal eastward movement of a planet against the background of hte distant stars.






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






44. 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.






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






46. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)






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






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






49. The point directly overhead.






50. The apparent magnitude a star would have if it were at a distance of 10 parsecs.