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 mass of an object divided by its volume






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






3. 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






4. A small chunk of rock in space






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






6. Distance from sun to nucleus- 8 kiloparsecs (26000 LY) - diameter of Milky way- 150000 LY - length for sun to orbit once around milky way- 250 million years






7. A force exerted by reflecting sunlight






8. First accurately measured the speed of light in a vacuum






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






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






11. The wavelengths where a specific element can absorb or emit light.






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






13. The particle horizon is the farthest we can see. It exists because the universe had a beginning and thus a definite age. Light from distances farther away from the particle horizon have not had time to reach us yet.






14. Ancient stream channels - flood planes - and sedimentary-type rock. Frozen water is found in the polar ice caps and in the soil.






15. Light scattered through the atmosphere that degrades astronomical images






16. A particle of light.






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






18. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE






19. Elliptical orbits that come inside orbit of the Earth.






20. The high- temperatature outer layer of the sun






21. The displacement of spectral lines to redder colors caused by the expansion of the universe.






22. The area behind a lens where images are resolved






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






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






25. The study of the universe as a whole.






26. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.






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






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






29. A spinning neutron star






30. The distance between a lens and its focal plane






31. Matter so dense that even light cannot escape its gravity






32. The family of radiant energy that includes light as a subset






33. The distance a moon can be from a planet before shattering from tidal forces






34. Approximate speed of light in a vacuum






35. The amount an image is enlarged by a telescope






36. The Greek philosopher responsible for making the stellar magnitude scale.






37. A plot of star absolute magnitude verses spectral type.






38. The normal eastward movement of a planet against the background of hte distant stars.






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






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






41. A bridge of material held in position above the solar surface. They can remain for hours even days






42. Ganymede






43. The relation that tells how light dims with distance.






44. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.






45. The number of protons in an atom.






46. Mercury






47. Distribution of dust (tells us disk is thin) - find distances to O&B stars and H2 regions (arms are sights of star formation and OB stars live and die at location of birth) -Milky way has four arms. Sun is in spur apart from arms.






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






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






50. Jupiter