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 small chunk of rock in space






2. Population 1- similar to the sun and 2% of elements are metal - Population 2- formed before gas was metal- only a fraction of mass is metal.






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






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






5. The telescope configuration that has the focus placed at the back of the primary mirror






6. A star that blows itself apart






7. Jupiter






8. 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.






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. A particle of light.






11. Large nebula consisting of very cold gas and dust






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






13. When massive objects bend space and time enough to create multiple images of an object located behind them






14. Matter that reveals itself only through its gravitational attraction.






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






16. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






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






18. Mercury - Venus - Earth - Mars






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






20. The law that syas light energy from a blackbody increases as (temperature^4)






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






22. The place in the sky that the Earth's axis points toward (can be either north or south)






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






24. Why do Galaxies move very rapidly in the interiors of the dense clusters?






25. 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






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






27. The slow wobble of the Earth on its rotation axis.






28. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals






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






30. Moon in less than the angular diameter of the Sun.






31. A representation of the changes in color and brightness of an evolving protostar.






32. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies






33. 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.






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






35. The material from which the solar system formed






36. The oldest grouping of stars - found in the galaxy halo






37. Matter that reveals itself only through its gravitational attraction






38. The gap etween saturn's A and B rings






39. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.






40. 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






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

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42. Comglomerates of ice and rock that orbit the sun in highly elliptical paths






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






44. A huge sphere of tenuous gas surrounding the nucleus of a comet






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






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






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






48. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)






49. Wave- only waves cause an interference pattern when passing through a double slit - particle- only particles deposit energy at specific locations (the way an image builds up on digital camera)






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