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. 100 nm 10 nm






2. A small spherical dark nebula






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






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






5. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE






6. 10 cm -> 1 mm






7. 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.






8. Electromagnetic Radiation






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






10. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density






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






12. A two-filter measure of the color - and hence temperature - of a star.






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






14. A planet orbiting about a distant star






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






16. A star that blows itself apart






17. Venus






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






19. All possible types of energy that can be emitted and absorbed by atoms.






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






21. The point directly overhead.






22. 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.






23. Jupiter






24. A force exerted by reflecting sunlight






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






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






27. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)






28. The equation that describes how matter equates with energy






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






30. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.






31. The force of attraction between any two objects having mass






32. Why does the earth have few craters while the moon has many?






33. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.






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






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






36. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy






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






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






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

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40. Titan






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






42. A star that is burning hydrogen to helium in a shell surrounding it's core






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






44. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core






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






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






47. 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






48. 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






49. Light scattered through the atmosphere that degrades astronomical images






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