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. Mercury and venus






2. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting






3. 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.






4. Earth






5. A particle of light






6. The rate of expansion of the universe.






7. Venus






8. 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.






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






10. Titan






11. A method of finding a star's distance from its absolute magnitude and spectral type or color.






12. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy






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






14. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas






15. 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 _____.






16. How did Earth come to have an oxygen rich atmosphere?






17. A bridge of material held in position above the solar surface. They can remain for hours even days






18. The larger bodies that formed early in teh solar nebula that were chemically differentiated






19. A long-lived high-pressure bulge in Jupiter's southern hemisphere






20. A point in the sky where meteors appear to come from during a shower






21. A star that is in the process of forming. It glows from gravitational contraction






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






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






24. The amount an image is enlarged by a telescope






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






26. Any change in the speed or direction of an object's motion






27. 10^2 nm 10^7 nm






28. 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 ________.






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






30. A continuous spectrum of light missing energy at a few wave lengths.






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






32. 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.






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

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34. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie

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35. 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)






36. Jupiter






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






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






39. The law that syas light energy from a blackbody increases as (temperature^4)






40. 1μm 100 nm






41. 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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42. 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






43. Centered on the Earth






44. A change in the wavelength of light caused by a motion between the observer and light (or wave) source (blue shift if getting closer - red shift if moving away)






45. The material from which the solar system formed






46. Where is the center of the expansion






47. A telescope that uses mirrors to focus light






48. The measure of a variable star's apparent magnitude as it brightens and dims with time






49. The rate of expansion of the universe.






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