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






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






3. The process that powers the sun and hydrogen bombs






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






5. 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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6. The lowest energy of an atom.






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

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8. 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.






9. A star that is in the process of forming. It glows from gravitational contraction






10. Half of the longest diameter across an ellipse






11. 1μm 100 nm






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






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






14. A bridge of material held in position above the solar surface. They can remain for hours even days






15. Saturn






16. A spinning neutron star






17. Centered on the sun.






18. When the Sun is farthest south of the celestial equator (About December 22)






19. The seasonal shifting of a nearby star's position relative to more distant objects.






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






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






22. The mass of an object divided by its volume






23. Dark areas on the sun that are cooler than the surrounding photosphere






24. When massive objects bend space and time enough to create multiple images of an object located behind them






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






26. A younger cluster of stars - found in the galaxy disk






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






28. 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






29. A spread of light with an uninterrupted wavelength distribution of energy.






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






31. Mercury and venus






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






33. Earth






34. 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)






35. Hydrogen and helium (mainly)






36. A planet that is closer to the sun than the earth






37. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.






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






39. The law that predicts the possible types of spectra.

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40. The larger bodies that formed early in teh solar nebula that were chemically differentiated






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






42. A term referring to the orbital character of stars near the Sun






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






44. What are the three possible geometries of the universe?






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






46. A prominence seen against the disk of the sun






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






48. A push or a pull






49. 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)






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