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 crystalline patter found in iron meteorites






2. A planet orbiting about a distant star






3. Poitns of gravitational stability in the orbit of a planet






4. The material from which the solar system formed






5. The number of protons in an atom.






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






7. Hot cells of gas that rise and fall in the hotosphere






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






9. Rich= dense crowded cores of galaxies - poor= few members and a looser organization of galaxies






10. Jupiter






11. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction






12. 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 ________.






13. Venus (retrograde)






14. Sc galaxies






15. What are the three possible geometries of the universe?






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






17. The particle horizon is the farthest we can see. It exists because the universe had a beginning and thus a definite age. Light from distances farther away from the particle horizon have not had time to reach us yet.






18. Earth






19. A phenomenon seen when the Earth passes through the orbit of a burned out comet






20. 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)






21. The rotation of a star or planet at different speeds at its equator and poles






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






23. When the Moon entirely blocks the Sun.






24. A term referring to Earth-like planets






25. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






26. Mercury






27. Dark areas on the sun that are cooler than the surrounding photosphere






28. The shadow behind the Earth or Moon where the Sun is partially obscured.






29. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder






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






31. The gap inthe outer portion of Saturn's A ring






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






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






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






35. Where is the center of the expansion






36. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)






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






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






39. 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.






40. A particle of light.






41. Half of the longest diameter across an ellipse






42. The 'edge' of the universe. Light beyond this has not reached us yet.






43. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t






44. The final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.






45. When a planet lines up with the sun inthe sky






46. 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.






47. The source of the force that is accelerating the expansion rate of the universe.






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






49. What is the universe expanding into?






50. Matter that reveals itself only through its gravitational attraction







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Can you answer 50 questions in 15 minutes?


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