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 organization of clusters of galaxies into sheets and strings






2. The high- temperatature outer layer of the sun






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






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






5. That which is responsible for Jupiter's magnetic field






6. Venus (retrograde)






7. Young clusters in disk are irregularly shaped since they have no time to relax into the rounder relaxed shape of globular clusters-will constantly be torn apart and assimilated.






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






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






10. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.






11. A planet orbiting about a distant star






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






13. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging






14. Mercury






15. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)






16. A faint - remarkably uniform distribution of radiation in space






17. A star that erratically and explosively brightens and dims






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






19. The layer of the sun just above the photosphere






20. 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.






21. Very center of galaxy. suggestion of a black hole






22. A high-pressure bulge in Neptune's southern hemisphere






23. Matter so dense that even light cannot escape its gravity






24. Infinitely long -> 10 cm






25. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






26. A spread of light with an uninterrupted wavelength distribution of energy.






27. A repeated - periodic push or pull capable of summing into a larger push or pull






28. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth






29. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto






30. The light produced when particles from the sun collide with atmospheric molecules






31. When the Sun is farthest north of the celestial equator (about June 22)






32. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere






33. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the






34. Heavier elements such as iron - silicon - magnesium - sulfer - nickel






35. Mercury






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






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






38. Radiation given off by electrons accelerating in a magnetic field






39. The dark - relativley smooth areas on the moon; Latin for sea






40. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.






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






42. An empirical scheme for predictin ghe orbital distances of planets






43. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant






44. A small and dim but hot star.






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






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






47. Jupiter






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






49. The crust of a meteorite caused by its entry into Earth's atmosphere






50. A word used in astronomy to describe all elements besides hydrogen and helium