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






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






3. 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.






4. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.






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






6. An object that may remain after a star explodes






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






8. Jupiter






9. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder






10. Elliptical orbits that come inside orbit of the Earth.






11. The law stating that hotter blackbodies look bluer than cooler blackbodies.


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






13. A term referring to Earth-like planets






14. The science of measuring light energy by wavelength.






15. A distance measure determined by the shifting of a star against the background sky every 6 months.






16. Ganymede






17. A particle of light






18. A quantity measuring the stability of the Earth's atmosphere






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






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






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






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






23. Material that shoots rapidly out into space. Flares cause Auroras






24. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core






25. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






26. Collections of young - hot stars






27. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t






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






29. Saturn






30. Mercury






31. A measure of the force of gravity on an object






32. 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.






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






34. The process that powers the sun and hydrogen bombs






35. Earth






36. The high- temperatature outer layer of the sun






37. The entity responsible for spiral arms in grand-design spiral galaxies






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






39. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density






40. A spread of light with an uninterrupted wavelength distribution of energy.






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






42. A galaxy sending out a stream of material from its nucleus






43. Mercury






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






45. A star that blows itself apart






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






47. The oldest grouping of stars - found in the galaxy halo






48. A method of finding a star's distance from its absolute magnitude and spectral type or color.






49. The cosmological principle is the assumption that the universe is isotropic and homogeneous.The Big Bang assumes it to be a correct principle so that what we observe is exactly like What is too far away to be observed.






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