Test your basic knowledge |

Subject : science
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this






2. The final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.






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






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






5. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core






6. The entity responsible for spiral arms in grand-design spiral galaxies






7. 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)






8. The rotation of a star or planet at different speeds at its equator and poles






9. The dark - relativley smooth areas on the moon; Latin for sea






10. A plot of star absolute magnitude verses spectral type.






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






12. Jupiter






13. 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






14. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






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






16. The north-south line passing directly overhead through the zenith.






17. Comglomerates of ice and rock that orbit the sun in highly elliptical paths






18. 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)






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






20. The source of the force that is accelerating the expansion rate of the universe.






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






22. Long - meandering cliff formed when a planet surface cools and shrinks






23. The process responsible for creating the arms of flocculent spiral galaxies






24. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.






25. A spectrum of light with energy at only a few wavelengths.






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






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






28. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)






29. A telescope that uses mirrors to focus light






30. 1μm 100 nm






31. The layer of the sun just above the photosphere






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






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






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






35. A rock or iron specimen that has fallen from space






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






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






38. Jupiter






39. The dimming of starlight by intervening dust






40. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






41. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






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






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






44. The process similar to conduction by which energy moves from the solar core to the convective layer






45. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use






46. Norhern lowlands- darker in color and have far fewer craters as if an ancient sea or ice field covered them. southern highlands- much higher in density of craters.






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






48. The rate of expansion of the universe.






49. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)






50. 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







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