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 measure of the ability of a telescope to see fine detail






2. A location on an H-are Diagram where evolving stars pulsate






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






4. 1μm 100 nm






5. 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






6. Where is the center of the expansion






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






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






9. 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.






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






11. The Big Bang says that the universe has not existed forever. It had a distinct beginning about 14 billion years ago called the 'Big Bang'. Therefore light from any object more than 14 billion light years away has not had time to reach us. The other p

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12. Hydrogen and helium (mainly)






13. A spinning neutron star






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






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






16. 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)






17. A push or a pull






18. A particle of light.






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






20. 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.






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






22. The place in the sky that the Earth's axis points toward (can be either north or south)






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






24. Matter so dense that even light cannot escape its gravity






25. Jupiter






26. Mercury and venus






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






28. A massive variable star used to find distances to the galaxies or clusters that contain them.






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






30. Europa






31. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.






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






33. The lowest energy of an atom.






34. A particle of light






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






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






37. When material is heated and moves taking the heat energy with it






38. Venus






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






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






41. 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






42. Electromagnetic Radiation






43. 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:






44. Neptune or uranus






45. 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






46. Large nebula consisting of very cold gas and dust






47. The mass of an object divided by its volume






48. A star fusing hydrogen to helium in it's core






49. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE






50. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation