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 entity from which the whole universe is postulated to have come from.






2. 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






3. Ganymede






4. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.






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






6. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






7. 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.






8. A crystalline patter found in iron meteorites






9. The dark - relativley smooth areas on the moon; Latin for sea






10. Venus






11. Hot cells of gas that rise and fall in the hotosphere






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






13. Ancient stream channels - flood planes - and sedimentary-type rock. Frozen water is found in the polar ice caps and in the soil.






14. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






15. A small and dim but hot star.






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






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






18. Dark areas on the sun that are cooler than the surrounding photosphere






19. Mercury and venus






20. The oldest part of the Milky Way






21. A younger cluster of stars - found in the galaxy disk






22. A particle of light.






23. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.






24. Radiation given off by electrons accelerating in a magnetic field






25. A large and bright but cool star.






26. A star that blows itself apart






27. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.






28. Ganymede and Titan






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






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






31. The 'edge' of the universe. Light beyond this has not reached us yet.






32. A term referring to Earth-like planets






33. 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.






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






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






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






37. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.






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






39. A faint - remarkably uniform distribution of radiation in space






40. 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)






41. A logarithmically scaled value for the measured brightness of a star.






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






43. How is the Hubble Law consistent with an expanding universe?






44. An object that may remain after a star explodes






45. Saturn






46. An energetic event taking place in the early universe






47. The rock that makes up the lunar highlands






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






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






50. Is there water on the moon?