Test your basic knowledge |

Subject : science
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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 a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






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






3. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use






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






5. 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






6. A star without enough mass to begin hydrogen fusion






7. Jupiter - Saturn - Uranus - Neptune






8. Is there water on the moon?






9. A subatomic particle with a negative charge. It creates light.






10. Saturn






11. A spectrum of light with energy at only a few wavelengths.






12. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






13. Mercury - Venus - Earth - Mars






14. When massive objects bend space and time enough to create multiple images of an object located behind them






15. The amount an image is enlarged by a telescope






16. A fusion process in which protons build together to form helium






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






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






19. 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






20. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids






21. The location in an H-are diagram of a star cluster - where stars have just left the main sequence. Used to estimate the cluster age.






22. A small spherical dark nebula






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






24. The number of protons in an atom.






25. 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.






26. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use






27. The rotation of a star or planet at different speeds at its equator and poles






28. A small spherical dark nebula






29. The projection of the Earth's equator onto the celestial sphere.






30. 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)






31. An evolved star - past the helium flash that is burning helium to carbon in it's cores






32. All possible types of energy that can be emitted and absorbed by atoms.






33. The point in its orbit where a planet is farthest from the sun






34. The dimming of starlight by intervening dust






35. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes






36. The lowest energy of an atom.






37. Infinitely long -> 10 cm






38. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this






39. The oldest part of the Milky Way






40. The universe is isotropic - homogeneous - and without beginning or end in time and space. If the universe is truly homogeneous then every line of sight will eventually end on a galaxy. If it has existed forever then there has been enough time for lig

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41. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula






42. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






43. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






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






45. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.






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






47. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites






48. The force of attraction between any two objects having mass






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






50. What causes the zones and belts on jupiter and saturn?