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 toroidal or donut-shaped collection of material attracted to a central body like a star or black hole. Dust around an object






2. A long-lived high-pressure bulge in Jupiter's southern hemisphere






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






4. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE






5. 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.






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






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






8. Mercury - Venus - Earth - Mars






9. 10^2 nm 10^7 nm






10. 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)






11. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object






12. Either Io -Europa - Ganymede - or Callisto






13. 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






14. Elliptical orbits that come inside orbit of the Earth.






15. A planet that is farther from the sun than the Earth is






16. Is space infinitely large?

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






18. The apparent path of the Sun through the stars on the celestial sphere.






19. 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.






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






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






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






23. The mass of an object divided by its volume






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






25. The amount an image is enlarged by a telescope






26. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter






27. The point in its orbit where a planet is nearest the sun






28. A perfect absorber and radiator of electromagnetic radiation.






29. Norhern lowlands- darker in color and have far fewer craters as if an ancient sea or ice field covered them. southern highlands- much higher in density of craters.






30. The wavelengths where a specific element can absorb or emit light.






31. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






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






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






34. A very dense - highly populated cluster of galaxies






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






36. The science of measuring the apparent magnitudes of stars by imaging them through different filters.






37. Form honeycomb like patterns surrounding empty or nearly empty voids.






38. The material from which the solar system formed






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






40. The gap inthe outer portion of Saturn's A ring






41. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula






42. A force exerted by reflecting sunlight






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






44. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast






45. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.






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






47. The Big Bang says that the universe has not existed forever. It had a distinct beginning about 14 billion years ago called the 'Big Bang'. Therefore light from any object more than 14 billion light years away has not had time to reach us. The other p

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48. The high- temperatature outer layer of the sun






49. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.






50. A subatomic particle with a negative charge. It creates light.