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






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






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






4. 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.






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






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






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






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






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






11. The distance between a lens and its focal plane






12. Any class of objects with a uniform luminosity used to determine distance.






13. Where is the center of the expansion






14. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






15. The law that predicts the possible types of spectra.

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16. The rate of expansion of the universe.






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






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






19. Venus






20. The mirror that determines the focus configuration of a reflector






21. 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






22. IO






23. The law that predicts the possible types of spectra.

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24. 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.






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






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






27. The part of the Milky way that has on-going star formation






28. The rock that makes up the lunar highlands






29. Large nebula consisting of very cold gas and dust






30. 10 nm 10^2 nm






31. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)






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






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






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






35. Hydrogen and helium (mainly)






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






37. 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






38. Mercury






39. 1μm 100 nm






40. A term referring to the orbital character of stars near the Sun






41. 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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42. Orbit in Jupiters orbit






43. The high- temperatature outer layer of the sun






44. 10 cm -> 1 mm






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






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






47. A two-filter measure of the color - and hence temperature - of a star.






48. 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)






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






50. 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.