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. A particle of light.






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






3. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas






4. A star that is burning hydrogen to helium in a shell surrounding it's core






5. Why do Galaxies move very rapidly in the interiors of the dense clusters?






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






7. 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.






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






9. The area behind a lens where images are resolved






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






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






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






13. A subatomic particle with a negative charge. It creates light.






14. 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.






15. The equation that describes how matter equates with energy






16. A term referring to Jupiter-like planets






17. A fusion process in which protons build together to form helium






18. A location on an H-are Diagram where evolving stars pulsate






19. A star that erratically and explosively brightens and dims






20. A small round distribution of gas surrounding a dying star






21. The first rock-sized bodies that formed in the solar nebula from dust grains






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






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






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






25. The surface of the sun






26. 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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27. When the Moon entirely blocks the Sun.






28. VENUS






29. Light scattered through the atmosphere that degrades astronomical images






30. The era when the ratio of matter to energy greatly favored matter. (verses radiation dominated universe where it was opaque. Matter is now dominated by gravity not photons)






31. What Ole Roemer used to measure the speed of light in a vacuum






32. 10^2 nm 10^7 nm






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






34. The elementary building blocks from which protons and neutrons are formed.






35. The law stating that hotter blackbodies look bluer than cooler blackbodies.

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36. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






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






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






39. Small moons that maintain the shape of rings around Saturn and Uranus






40. 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.






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






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






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






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






45. A telescope that uses mirrors to focus light






46. 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)






47. A term referring to Earth-like planets






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






49. A measure of the ability of a telescope to see fine detail






50. VENUS