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. What are the three possible geometries of the universe?






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






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






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






5. Orbit in Jupiters orbit






6. 10^2 nm 10^7 nm






7. The temp at which a substance in the vacuum of space solidifies






8. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)






9. A star that is burning hydrogen to helium in a shell surrounding it's core






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






11. A planet orbiting about a distant star






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






13. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






14. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites






15. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE






16. 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






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






18. The distance between a lens and its focal plane






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






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






21. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction






22. Either Io -Europa - Ganymede - or Callisto






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






24. 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






25. The universe is isotropic - homogeneous - and without beginning or end in time and space. If the universe is truly homogeneous then every line of sight will eventually end on a galaxy. If it has existed forever then there has been enough time for lig

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26. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.






27. What is the universe expanding into?






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






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






30. A telescope that uses mirrors to focus light






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






32. The elementary building blocks from which protons and neutrons are formed.






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






34. A force exerted by reflecting sunlight






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






36. The area behind a lens where images are resolved






37. Earth






38. The wavelengths where a specific element can absorb or emit light.






39. A change in the appearance of the sun at the edge of the solar disk






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






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






42. The telescope configuration that has the focus placed at the back of the primary mirror






43. 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.






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






45. The entity from which the whole universe is postulated to have come from.






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






47. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.






48. The science of measuring light energy by wavelength.






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






50. Possible Fates of the Universe