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. A telescope that uses mirrors to focus light






2. When the Moon entirely blocks the Sun.






3. The final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.






4. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)






5. A collection of galaxies like the one the Milky Way belongs to






6. When one side of a body always faces the planet it revolves around






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






8. A toroidal or donut-shaped collection of material attracted to a central body like a star or black hole. Dust around an object






9. 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.






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






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






12. 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






13. Mercury and venus






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






15. 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






16. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:






17. A word meaning 'the same in all directions.'






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






19. 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.






20. The crust of a meteorite caused by its entry into Earth's atmosphere






21. 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






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






23. A star that erratically and explosively brightens and dims






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






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






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






27. All wavelengths of light emitted by a blackbody.






28. The point directly overhead.






29. Either Io -Europa - Ganymede - or Callisto






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






31. 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






32. The 'edge' of the universe. Light beyond this has not reached us yet.






33. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.






34. When one side of a body always faces the planet it revolves around






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






36. Is space infinitely large?

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






38. The distance between a lens and its focal plane






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






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






41. Jupiter - Saturn - Uranus - Neptune






42. The rotation period of the Earth measured relative to the Sun.






43. Why do Galaxies move very rapidly in the interiors of the dense clusters?






44. A crystalline patter found in iron meteorites






45. The science of measuring light energy by wavelength.






46. The oldest grouping of stars - found in the galaxy halo






47. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies






48. Jupiter






49. The mass of an object divided by its volume






50. The act of removing an electron from an atom.






Can you answer 50 questions in 15 minutes?



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