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 rock or iron specimen that has fallen from space






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






3. The gap etween saturn's A and B rings






4. Centered on the Earth






5. Venus (retrograde)






6. The most mass a white dwarf can have before collapsing to a neutron star






7. 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






8. The distance between a lens and its focal plane






9. Either Io -Europa - Ganymede - or Callisto






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






11. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes






12. The movement of the Earth's crustal plates riding on top of the mantle.






13. 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






14. The law stating that hotter blackbodies look bluer than cooler blackbodies.

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






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






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






18. The area behind a lens where images are resolved






19. The lens that gathers the light in a refractor






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






21. Ganymede






22. That which is responsible for Jupiter's magnetic field






23. 10 cm -> 1 mm






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






25. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






26. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)






27. A very dense - highly populated cluster of galaxies






28. 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.






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






30. A small spherical dark nebula






31. An evolved star - past the helium flash that is burning helium to carbon in it's cores






32. The area behind a lens where images are resolved






33. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object






34. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)






35. All possible types of energy that can be emitted and absorbed by atoms.






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






37. Mercury - Venus - Earth - Mars






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






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






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






41. The oldest part of the Milky Way






42. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting






43. A long-lived high-pressure bulge in Jupiter's southern hemisphere






44. The place in the sky that the Earth's axis points toward (can be either north or south)






45. A term referring to Jupiter-like planets






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






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






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






49. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)






50. An empirical scheme for predictin ghe orbital distances of planets