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. Very center of galaxy. suggestion of a black hole






2. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.






3. A spectrum of light with energy at only a few wavelengths.






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






5. The material from which the solar system formed






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






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






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






9. 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






10. An important quality of telescopes that increases as the square of the primary mirror or objective lens






11. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)






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






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






14. The crust of a meteorite caused by its entry into Earth's atmosphere






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






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






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






18. The mass of an object divided by its volume






19. 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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20. Any class of objects with a uniform luminosity used to determine distance.






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






22. The source of the force that is accelerating the expansion rate of the universe.






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






24. The amount an image is enlarged by a telescope






25. The part of the Milky way that has on-going star formation






26. The process that powers the sun and hydrogen bombs






27. Orbit in Jupiters orbit






28. The oldest part of the Milky Way






29. The rock that makes up the lunar highlands






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






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






32. A word used in astronomy to describe all elements besides hydrogen and helium






33. 100 nm 10 nm






34. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this






35. A particle of light






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






37. A particle of light






38. What causes the zones and belts on jupiter and saturn?






39. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie

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40. Matter so dense that even light cannot escape its gravity






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

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






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






44. The law stating that hotter blackbodies look bluer than cooler blackbodies.

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






46. The distance between a lens and its focal plane






47. The lowest energy of an atom.






48. The location of a supermassive black hole






49. A prominence seen against the disk of the sun






50. 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.