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. Mercury - Venus - Earth - Mars






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






3. Loops that trace the magnetic field as it erupts from a sunspot area and arches over to an adjacent area. They glow in the light of gas pouring out of corona and falling into photosphere.






4. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE






5. Large nebula consisting of very cold gas and dust






6. IO






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






8. The surface of the sun






9. 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






10. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)






11. The rock that makes up the lunar maria






12. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas






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






14. Mercury - Venus - Earth - Mars






15. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter






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






18. What Ole Roemer used to measure the speed of light in a vacuum






19. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)






20. 10 cm -> 1 mm






21. The location around an atom where an electron resides.






22. A force exerted by reflecting sunlight






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






24. A telescope that uses mirrors to focus light






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






26. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






27. The mass of an object divided by its volume






28. 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)






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






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

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31. A prominence seen against the disk of the sun






32. Sc galaxies






33. A change in the wavelength of light caused by a motion between the observer and light (or wave) source (blue shift if getting closer - red shift if moving away)






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






35. The organization of clusters of galaxies into sheets and strings






36. Matter that reveals itself only through its gravitational attraction.






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






38. A subatomic particle with a negative charge. It creates light.






39. A crystalline patter found in iron meteorites






40. The law that describes the blackbody curve - and let to quantum mechanics.

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41. A subatomic particle with a negative charge. It creates light.






42. Either Io -Europa - Ganymede - or Callisto






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






44. A small chunk of rock in space






45. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)






46. Possible Fates of the Universe






47. Approximate speed of light in a vacuum






48. The oldest terrain on the moon






49. The distance between a lens and its focal plane






50. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast