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 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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2. Why does the earth have few craters while the moon has many?






3. Mercury - Venus - Earth - Mars






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






5. A huge sphere of tenuous gas surrounding the nucleus of a comet






6. The mirror that gathers the light in a reflector






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






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






9. Light scattered through the atmosphere that degrades astronomical images






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






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






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






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






14. Moon in less than the angular diameter of the Sun.






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






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






17. The apparent backward motion of a planet against the background of stars.






18. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)






19. An important quality of telescopes that increases as the square of the primary mirror or objective lens






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






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






22. Is there water on the moon?






23. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE






24. Is there water on the moon?






25. A large and bright but cool star.






26. Where is the center of the expansion






27. A push or a pull






28. The mirror that gathers the light in a reflector






29. 1μm 100 nm






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






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






32. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.






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






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






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

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36. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy






37. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals






38. 10 nm 10^2 nm






39. A collection of galaxies like the one the Milky Way belongs to






40. Is space infinitely large?

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






42. The telescope configuration that has the focus placed at the back of the primary mirror






43. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






44. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker






45. Jupiter






46. 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.






47. The process that powers the sun and hydrogen bombs






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






49. Jupiter - Saturn - Uranus - Neptune






50. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)