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 collection of comets in the plane of the solar system - located beyond the orbit of Pluto






2. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)






3. Where is the center of the expansion






4. Ganymede and Titan






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






6. The process that powers the sun and hydrogen bombs






7. 100 nm 10 nm






8. The mass of an object divided by its volume






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






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






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






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






13. A huge sphere of tenuous gas surrounding the nucleus of a comet






14. A phenomenon seen when the Earth passes through the orbit of a burned out comet






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






16. A crystalline patter found in iron meteorites






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






18. A galaxy emitting large amounts of energy at long wavelengths.






19. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t






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






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






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






23. All wavelengths of light emitted by a blackbody.






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






25. Radiation (possibly left over from the big bang) that fills the universe. Perfect black body spectrum and tells us a bit aout how galaxies are formed.






26. The Big Bang says that the universe has not existed forever. It had a distinct beginning about 14 billion years ago called the 'Big Bang'. Therefore light from any object more than 14 billion light years away has not had time to reach us. The other p

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27. Earth






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






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






30. 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.






31. The apparent path of the Sun through the stars on the celestial sphere.






32. Sc galaxies






33. 1. We see rapid movements or high energy radiation coming at some level from the nuclei of nearly every galaxy we have looked at. 2. We suspect that the creation of these supermassive black holes is part of the galaxy formation process.






34. The oldest part of the Milky Way






35. A term referring to Jupiter-like planets






36. When the Moon entirely blocks the Sun.






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






38. Material that shoots rapidly out into space. Flares cause Auroras






39. First accurately measured the speed of light in a vacuum






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






41. When material is heated and moves taking the heat energy with it






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






43. The powdered stone fragments that make up the lunar 'soil'






44. Electromagnetic Radiation






45. The projection of the Earth's equator onto the celestial sphere.






46. The Greek philosopher responsible for making the stellar magnitude scale.






47. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.






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






49. The average distance between the Earth and the Sun (=1.5 x10^8km)






50. How is the Hubble Law consistent with an expanding universe?