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. Collections of young - hot stars






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






3. The family of radiant energy that includes light as a subset






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






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






6. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process






7. Venus






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






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






10. IO






11. A volume of space where few - if any - galaxies are located






12. The Greek philosopher responsible for making the stellar magnitude scale.






13. Long - meandering cliff formed when a planet surface cools and shrinks






14. 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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15. 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.






16. Europa






17. Mercury






18. The surface of the sun






19. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)






20. The universe is isotropic - homogeneous - and without beginning or end in time and space. If the universe is truly homogeneous then every line of sight will eventually end on a galaxy. If it has existed forever then there has been enough time for lig

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21. A term referring to Earth-like planets






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






23. 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






24. The process of acquiring material






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






26. 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






27. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation






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






29. Possible Fates of the Universe






30. IO






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






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






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

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34. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)






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






36. A small chunk of rock in space






37. The act of removing an electron from an atom.






38. What is the universe expanding into?






39. Infinitely long -> 10 cm






40. The normal eastward movement of a planet against the background of hte distant stars.






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






42. Mercury






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






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






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






46. The distance between a lens and its focal plane






47. The mirror that determines the focus configuration of a reflector






48. Large nebula consisting of very cold gas and dust






49. The number of protons in an atom.






50. Approximate speed of light in a vacuum