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 seasonal shifting of a nearby star's position relative to more distant objects.






2. Is space infinitely large?


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






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






5. Infinitely long -> 10 cm






6. Titan






7. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth






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


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






10. The place in the sky that the Earth's axis points toward (can be either north or south)






11. Venus






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






13. 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.






14. Hydrogen and helium (mainly)






15. A streak of light in the atmosphere






16. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






17. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the






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






19. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.






20. A very dense - highly populated cluster of galaxies






21. 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






22. 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






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






24. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder






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






26. The distance between a lens and its focal plane






27. A star fusing hydrogen to helium in it's core






28. Electromagnetic Radiation






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






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






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






32. What causes the zones and belts on jupiter and saturn?






33. The temp at which a substance in the vacuum of space solidifies






34. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.






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






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






37. 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






38. A massive variable star used to find distances to the galaxies or clusters that contain them.






39. A particle of light.






40. Electromagnetic Radiation






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






42. Venus






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






44. Jupiter






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






46. 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.






47. The process that powers the sun and hydrogen bombs






48. The layer of the sun just above the photosphere






49. Matter that reveals itself only through its gravitational attraction.






50. Possible Fates of the Universe