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. 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






2. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids






3. 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






4. The rock that makes up the lunar highlands






5. 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.






6. Mercury






7. A distance measure determined by the shifting of a star against the background sky every 6 months.






8. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






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

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10. The point directly overhead.






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






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






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






14. The dark - relativley smooth areas on the moon; Latin for sea






15. Small moons that maintain the shape of rings around Saturn and Uranus






16. The number of protons in an atom.






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






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






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






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






21. Centered on the sun.






22. A rock or iron specimen that has fallen from space






23. The area behind a lens where images are resolved






24. The light produced when particles from the sun collide with atmospheric molecules






25. What do we think the actual fate of the universe will be and why do we think this?






26. Large nebula consisting of very cold gas and dust






27. Venus






28. Either Io -Europa - Ganymede - or Callisto






29. A term referring to Jupiter-like planets






30. A term referring to the orbital character of stars near the Sun






31. Titan






32. The apparent backward motion of a planet against the background of stars.






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






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






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






36. The surface of the sun






37. 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)






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






39. When a planet lines up with the sun inthe sky






40. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc






41. The rotation period of the Earth measured relative to the Sun.






42. What is the universe expanding into?






43. An entity that is likely in the nucleus of most - if not all - galaxies.






44. The powdered stone fragments that make up the lunar 'soil'






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. 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






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






48. The mirror that gathers the light in a reflector






49. A high-pressure bulge in Neptune's southern hemisphere






50. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)