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






2. Clouds of low density gas often found glowing faintly on either side of an AGN.






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






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






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






6. The oldest part of the Milky Way






7. 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)






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






9. Orbit in Jupiters orbit






10. The powdered stone fragments that make up the lunar 'soil'






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






12. A fusion process in which protons build together to form helium






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






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






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






16. Dying large-mass stars lose their outer layers in a violent explosion creating large - chaotic remnants. these brighten like nova but are so much brighter and only occur ONCE PER STAR






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






18. The oldest part of the Milky Way






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






20. A bright area of higher temperature that often proceeds the formation of sunspots.






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






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






23. 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






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






25. The mirror that gathers the light in a reflector






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






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






28. What causes the zones and belts on jupiter and saturn?






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






30. The lowest energy of an atom.






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






32. A change in the appearance of the sun at the edge of the solar disk






33. Ganymede






34. Possible Fates of the Universe






35. Moon in less than the angular diameter of the Sun.






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






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






38. 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)






39. Saturn






40. The equation that describes how matter equates with energy






41. 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)






42. Sc galaxies






43. A small chunk of rock in space






44. Approximate speed of light in a vacuum






45. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes






46. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.






47. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:






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






49. 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






50. A spinning neutron star