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. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)






2. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)






3. 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.






4. VENUS






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






6. The law that describes the blackbody curve - and let to quantum mechanics.


7. The most mass a white dwarf can have before collapsing to a neutron star






8. The gap inthe outer portion of Saturn's A ring






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






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






11. The mirror that determines the focus configuration of a reflector






12. Mercury






13. An element of a highly efficient - two-dimensional electronic light detector






14. A star that blows itself apart






15. VENUS






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






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






18. Mercury






19. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere






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






21. A volume of space where few - if any - galaxies are located






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






23. Venus






24. The rotation period of the Earth measured relative to the stars.






25. When particles are compressed to an unnatural state where their pressure is not related to their temperature






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






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






28. The surface of the sun






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






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






31. A spread of light with an uninterrupted wavelength distribution of energy.






32. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.






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






34. Saturn






35. A prominence seen against the disk of the sun






36. Venus (retrograde)






37. Loops that trace the magnetic field as it erupts from a sunspot area and arches over to an adjacent area. They glow in the light of gas pouring out of corona and falling into photosphere.






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






39. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:






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. 10^2 nm 10^7 nm






42. Ganymede






43. A particle of light






44. A telescope that uses mirrors to focus light






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






46. The name for the only seriously considered theory of the universe.






47. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)






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






49. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)






50. A fusion process in which protons build together to form helium