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. 10 cm -> 1 mm






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






3. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.






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






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






6. The area behind a lens where images are resolved






7. A fusion process in which protons build together to form helium






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






9. The location in the Milky Way where stars orbit like a solid wheel






10. The surface of the sun






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






12. The process that powers the sun and hydrogen bombs






13. When a planet lines up with the sun inthe sky






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






15. The oldest terrain on the moon






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






17. A faint - remarkably uniform distribution of radiation in space






18. The mass of an object divided by its volume






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






20. Neptune or uranus






21. The science of measuring the apparent magnitudes of stars by imaging them through different filters.






22. Approximate speed of light in a vacuum






23. Any class of objects with a uniform luminosity used to determine distance.






24. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu






25. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.






26. A rock or iron specimen that has fallen from space






27. When the Sun is farthest south of the celestial equator (About December 22)






28. The distance between a lens and its focal plane






29. An energetic event taking place in the early universe






30. 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.






31. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.






32. The measure of a variable star's apparent magnitude as it brightens and dims with time






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






34. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation






35. A telescope that uses lenses to focus light






36. Either Io -Europa - Ganymede - or Callisto






37. 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






38. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






39. Any change in the speed or direction of an object's motion






40. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.






41. Radiation given off by electrons accelerating in a magnetic field






42. Centered on the sun.






43. The surface of the sun






44. A star that blows itself apart






45. Approximate speed of light in a vacuum






46. Collections of young - hot stars






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






48. A logarithmically scaled value for the measured brightness of a star.






49. The entity responsible for spiral arms in grand-design spiral galaxies






50. The era when the ratio of matter to energy greatly favored matter. (verses radiation dominated universe where it was opaque. Matter is now dominated by gravity not photons)







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


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