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. 10^2 nm 10^7 nm






2. 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)






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






4. The lens in a telescope used to determine the magnification






5. 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)






6. 10^2 nm 10^7 nm






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






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






9. A star that blows itself apart






10. The act of removing an electron from an atom.






11. Small moons that maintain the shape of rings around Saturn and Uranus






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






13. A star that erratically and explosively brightens and dims






14. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.






15. The layer of the sun just above the photosphere






16. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant






17. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting






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






19. Large nebula consisting of very cold gas and dust






20. 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






21. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy






22. An object that may remain after a star explodes






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






24. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)






25. When one side of a body always faces the planet it revolves around






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






27. The number of protons in an atom.






28. When a planet lines up with the sun inthe sky






29. Venus (retrograde)






30. The oldest terrain on the moon






31. A volume of space where few - if any - galaxies are located






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






33. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.






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






35. A very dense - highly populated cluster of galaxies






36. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.






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






38. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE






39. The study of the universe as a whole.






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






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






42. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape






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






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






45. An energetic event taking place in the early universe






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






47. A large and bright but cool star.






48. Neptune or uranus






49. A star that blows itself apart






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