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. When the Sun moves from south to north across the celestial equator (about March 21)






2. 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






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






4. Jupiter






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






6. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE






7. All wavelengths of light emitted by a blackbody.






8. The surface of the sun






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






10. Jupiter






11. 1μm 100 nm






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

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






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






15. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas






16. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction






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






18. The oldest terrain on the moon






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






20. The number of protons in an atom.






21. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.






22. The location around an atom where an electron resides.






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






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






25. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas






26. 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:






27. 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.






28. IO






29. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes






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






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






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






33. VENUS






34. The science of measuring light energy by wavelength.






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






36. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.






37. A force exerted by reflecting sunlight






38. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.






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






40. The study of the universe as a whole.






41. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant






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






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






44. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant






45. The movement of the Earth's crustal plates riding on top of the mantle.






46. When one side of a body always faces the planet it revolves around






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






48. Mercury and venus






49. Long - meandering cliff formed when a planet surface cools and shrinks






50. The fusion process that turns three helium nuclei into a carbon nucleus