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 particle of light.






2. Centered on the sun.






3. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites






4. A term referring to Earth-like planets






5. A small spherical dark nebula






6. The elementary building blocks from which protons and neutrons are formed.






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






8. Large nebula consisting of very cold gas and dust






9. The distance a moon can be from a planet before shattering from tidal forces






10. A very dense - highly populated cluster of galaxies






11. The number of protons in an atom.






12. The particle horizon is the farthest we can see. It exists because the universe had a beginning and thus a definite age. Light from distances farther away from the particle horizon have not had time to reach us yet.






13. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






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






15. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.






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






17. How did Earth come to have an oxygen rich atmosphere?






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






19. The oldest terrain on the moon






20. Ganymede






21. The point in its orbit where a planet is farthest from the sun






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






23. The dimming of starlight by intervening dust






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






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






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






27. Dark - reddish - low-pressure bands in Jupiter's atmosphere






28. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






29. 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)






30. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting






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






33. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.






34. A large and bright but cool star.






35. The oldest part of the Milky Way






36. 10^2 nm 10^7 nm






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






38. A faint - remarkably uniform distribution of radiation in space






39. Jupiter






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






41. A star that erratically and explosively brightens and dims






42. The displacement of spectral lines to redder colors caused by the expansion of the universe.






43. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging






44. A crystalline patter found in iron meteorites






45. An evolved star - past the helium flash that is burning helium to carbon in it's cores






46. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.






47. The equation that describes how matter equates with energy






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






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






50. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use