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. 1μm 100 nm






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






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






4. 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)






5. The north-south line passing directly overhead through the zenith.






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






7. 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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8. Orbit in Jupiters orbit






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






10. Infinitely long -> 10 cm






11. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)






12. The rock that makes up the lunar highlands






13. When the Sun is farthest south of the celestial equator (About December 22)






14. Electromagnetic Radiation






15. An element of a highly efficient - two-dimensional electronic light detector






16. Dying large-mass stars lose their outer layers in a violent explosion creating large - chaotic remnants. these brighten like nova but are so much brighter and only occur ONCE PER STAR






17. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.






18. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.






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






20. 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.






21. 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 ________.






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






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






24. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.






25. 100 nm 10 nm






26. A perfect absorber and radiator of electromagnetic radiation.






27. When the Sun moves from south to north across the celestial equator (about March 21)






28. 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.






29. The surface of the sun






30. A planet that is closer to the sun than the earth






31. The equation that describes how matter equates with energy






32. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.






33. The shadow area behind the Earth or Moon where the Sun is completely obscured.






34. 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






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






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






37. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






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






39. A small and dim but hot star.






40. A particle of light.






41. Orbit in Jupiters orbit






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






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






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






45. The seasonal shifting of a nearby star's position relative to more distant objects.






46. 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.






47. A spinning neutron star






48. The organization of clusters of galaxies into sheets and strings






49. A very dense - highly populated cluster of galaxies






50. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc