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 location in an H-are diagram of a star cluster - where stars have just left the main sequence. Used to estimate the cluster age.






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






3. A telescope that uses mirrors to focus light






4. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






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






6. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)






7. Small moons that maintain the shape of rings around Saturn and Uranus






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






9. The part of the Milky way that has on-going star formation






10. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging






11. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.






12. 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.






13. Dark areas on the sun that are cooler than the surrounding photosphere






14. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.






15. Collections of young - hot stars






16. Saturn






17. An entity that is likely in the nucleus of most - if not all - galaxies.






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






19. A particle of light






20. The equation that describes how matter equates with energy






21. Infinitely long -> 10 cm






22. 10^2 nm 10^7 nm






23. The point directly overhead.






24. Mercury and venus






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






26. A large and bright but cool star.






27. A word used in astronomy to describe all elements besides hydrogen and helium






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






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






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






31. In what chemical form are jupiters nitrogen - carbon and oxygen?






32. 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.






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






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






35. A repeated - periodic push or pull capable of summing into a larger push or pull






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






37. Young clusters in disk are irregularly shaped since they have no time to relax into the rounder relaxed shape of globular clusters-will constantly be torn apart and assimilated.






38. Jupiter - Saturn - Uranus - Neptune






39. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density






40. Moon in less than the angular diameter of the Sun.






41. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE






42. The mirror that gathers the light in a reflector






43. The part of the Milky way that has on-going star formation






44. Neptune or uranus






45. Electromagnetic Radiation






46. Large nebula consisting of very cold gas and dust






47. 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.






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






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






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