Test your basic knowledge |

Subject : science
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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 term referring to Jupiter-like planets






2. The final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.






3. 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.






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






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






6. A change in the wavelength of light caused by a motion between the observer and light (or wave) source (blue shift if getting closer - red shift if moving away)






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






8. Hot cells of gas that rise and fall in the hotosphere






9. Mercury






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






11. An object that may remain after a star explodes






12. The larger bodies that formed early in teh solar nebula that were chemically differentiated






13. A point in the sky where meteors appear to come from during a shower






14. Ganymede






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

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






17. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






18. A small and dim but hot star.






19. 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)






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






21. The study of the universe as a whole.






22. A prominence seen against the disk of the sun






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






24. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






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






26. A star that blows itself apart






27. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.






28. The rock that makes up the lunar highlands






29. Electromagnetic Radiation






30. Centered on the Earth






31. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.






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






33. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)






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






35. 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






36. The study of the universe as a whole.






37. Venus






38. 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






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






40. 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.






41. Matter that reveals itself only through its gravitational attraction






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






43. Large nebula consisting of very cold gas and dust






44. What is the universe expanding into?






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






46. The average distance between the Earth and the Sun (=1.5 x10^8km)






47. A planet that is closer to the sun than the earth






48. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)






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






50. A location on an H-are Diagram where evolving stars pulsate