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






2. A force exerted by reflecting sunlight






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






4. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.






5. Electromagnetic Radiation






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






7. Centered on the Earth






8. Hydrogen and helium (mainly)






9. Is there water on the moon?






10. Then the Sun moves from north to south across the celestial equator (about September 23)






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






12. That which is responsible for Jupiter's magnetic field






13. Neptune or uranus






14. Venus






15. Dark - reddish - low-pressure bands in Jupiter's atmosphere






16. Half of the longest diameter across an ellipse






17. The high- temperatature outer layer of the sun






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






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






20. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






21. 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.






22. A small spherical dark nebula






23. Rich= dense crowded cores of galaxies - poor= few members and a looser organization of galaxies






24. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.






25. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape






26. The lens in a telescope used to determine the magnification






27. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.






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






29. The shadow area behind the Earth or Moon where the Sun is completely obscured.






30. A star that is in the process of forming. It glows from gravitational contraction






31. Collections of young - hot stars






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






33. Either Io -Europa - Ganymede - or Callisto






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

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35. A spectrum of light with energy at only a few wavelengths.






36. An energetic event taking place in the early universe






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






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






39. All wavelengths of light emitted by a blackbody.






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






41. How did Earth come to have an oxygen rich atmosphere?






42. Earth






43. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)






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






45. A push or a pull






46. Poitns of gravitational stability in the orbit of a planet






47. A particle of light.






48. What is the universe expanding into?






49. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy






50. Form honeycomb like patterns surrounding empty or nearly empty voids.