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. A push or a pull






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






3. Orbit in Jupiters orbit






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






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






6. 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






7. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.






8. Why do Galaxies move very rapidly in the interiors of the dense clusters?






9. 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:






10. 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)






11. An evolved star - past the helium flash that is burning helium to carbon in it's cores






12. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.






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






14. Form honeycomb like patterns surrounding empty or nearly empty voids.






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






16. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)






17. 1 mm 1μm






18. 100 nm 10 nm






19. The force of attraction between any two objects having mass






20. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)






21. The fusion process that turns three helium nuclei into a carbon nucleus






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






23. The oldest part of the Milky Way






24. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker






25. The mix of pure photon energy that emerged at the start of the universe.






26. When the Sun moves from south to north across the celestial equator (about March 21)






27. An energetic event taking place in the early universe






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






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






30. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process






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






32. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals






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






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






35. A prominence seen against the disk of the sun






36. 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






37. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy






38. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object






39. A star without enough mass to begin hydrogen fusion






40. The law that syas light energy from a blackbody increases as (temperature^4)






41. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.






42. When the Moon entirely blocks the Sun.






43. 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






44. The name for the only seriously considered theory of the universe.






45. 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)






46. An element of a highly efficient - two-dimensional electronic light detector






47. Distance from sun to nucleus- 8 kiloparsecs (26000 LY) - diameter of Milky way- 150000 LY - length for sun to orbit once around milky way- 250 million years






48. A planet that is farther from the sun than the Earth is






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






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