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 number of protons in an atom.






2. A measure of the ability of a telescope to see fine detail






3. The mirror that determines the focus configuration of a reflector






4. 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






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






6. 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)






7. Very center of galaxy. suggestion of a black hole






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






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






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






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






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






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

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14. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






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






16. The amount an image is enlarged by a telescope






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






18. Dark - reddish - low-pressure bands in Jupiter's atmosphere






19. All wavelengths of light emitted by a blackbody.






20. 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)






21. The sinking of denser elements to the center of a young molten planet






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






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






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






25. A representation of the changes in color and brightness of an evolving protostar.






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






27. The measure of a variable star's apparent magnitude as it brightens and dims with time






28. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation






29. 10^2 nm 10^7 nm






30. The area behind a lens where images are resolved






31. A particle of light.






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






33. The rock that makes up the lunar maria






34. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)






35. The imaginary sphere centered on the Earth that hols the stars.






36. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.






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






38. The layer of the sun just above the photosphere






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






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






41. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.






42. The imaginary sphere centered on the Earth that hols the stars.






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






44. The measure of a variable star's apparent magnitude as it brightens and dims with time






45. How did Earth come to have an oxygen rich atmosphere?






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






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






48. Rich= dense crowded cores of galaxies - poor= few members and a looser organization of galaxies






49. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.






50. What do we think the actual fate of the universe will be and why do we think this?







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