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






2. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.






3. 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)






4. 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.






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






6. What is the universe expanding into?






7. The lens that gathers the light in a refractor






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






9. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)






10. A term referring to Jupiter-like planets






11. Radiation (possibly left over from the big bang) that fills the universe. Perfect black body spectrum and tells us a bit aout how galaxies are formed.






12. 10^2 nm 10^7 nm






13. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.






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






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






16. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.






17. The number of protons in an atom.






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






19. 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






20. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.

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






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






23. Mercury - Venus - Earth - Mars






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






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






26. The relation that tells how light dims with distance.






27. VENUS






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. Jupiter - Saturn - Uranus - Neptune






30. Then the Sun moves from north to south across the celestial equator (about September 23)






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






32. Light scattered through the atmosphere that degrades astronomical images






33. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)






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






35. The mirror that gathers the light in a reflector






36. The location in the Milky Way where stars orbit like a solid wheel






37. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes






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






39. The layer of the sun just above the photosphere






40. When particles are compressed to an unnatural state where their pressure is not related to their temperature






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






42. The dimming of starlight by intervening dust






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






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






46. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






47. Poitns of gravitational stability in the orbit of a planet






48. A word used in astronomy to describe all elements besides hydrogen and helium






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






50. Form honeycomb like patterns surrounding empty or nearly empty voids.