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 source of the force that is accelerating the expansion rate of the universe.






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. A very dense - highly populated cluster of galaxies






4. Collections of young - hot stars






5. In what chemical form are jupiters nitrogen - carbon and oxygen?






6. The process responsible for creating the arms of flocculent spiral galaxies






7. 10 nm 10^2 nm






8. A planet orbiting about a distant star






9. A term referring to Jupiter-like planets






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






11. 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






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






13. A streak of light in the atmosphere






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






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






16. A plot of star absolute magnitude verses spectral type.






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






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






19. A word meaning 'the same everywhere throughout.'






20. The average distance between the Earth and the Sun (=1.5 x10^8km)






21. Light-colored high-pressure bands in Jupiter's atmosphere






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






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






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






25. 1μm 100 nm






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






27. The number of protons in an atom.






28. Loops that trace the magnetic field as it erupts from a sunspot area and arches over to an adjacent area. They glow in the light of gas pouring out of corona and falling into photosphere.






29. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies






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






31. The point in its orbit where a planet is nearest the sun






32. What Ole Roemer used to measure the speed of light in a vacuum






33. The process of acquiring material






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






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






36. A spinning neutron star






37. A star without enough mass to begin hydrogen fusion






38. A high-pressure bulge in Neptune's southern hemisphere






39. A star that is burning hydrogen to helium in a shell surrounding it's core






40. IO






41. 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.






42. Approximate speed of light in a vacuum






43. The location around an atom where an electron resides.






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






45. The displacement of spectral lines to redder colors caused by the expansion of the universe.






46. Centered on the Earth






47. 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.






48. The organization of clusters of galaxies into sheets and strings






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






50. The amount an image is enlarged by a telescope