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. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.






2. A telescope that uses lenses to focus light






3. 1μm 100 nm






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






5. The larger bodies that formed early in teh solar nebula that were chemically differentiated






6. The location of a supermassive black hole






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






8. When one side of a body always faces the planet it revolves around






9. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.






10. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast






11. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula






12. The study of the universe as a whole.






13. Matter that reveals itself only through its gravitational attraction






14. The dimming of starlight by intervening dust






15. Venus






16. A rock or iron specimen that has fallen from space






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






18. A two-filter measure of the color - and hence temperature - of a star.






19. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.






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






21. A word meaning 'the same in all directions.'






22. 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.






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






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






25. Saturn






26. 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 ________.






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






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






29. An entity that is likely in the nucleus of most - if not all - galaxies.






30. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






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






32. Sc galaxies






33. The number of protons in an atom.






34. 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.






35. The entity from which the whole universe is postulated to have come from.






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






37. A telescope that uses mirrors to focus light






38. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.






39. 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.






40. 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.






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






42. 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.






43. Loops that trace the magnetic field as it erupts from a sunspot area and arches over to an adjacent area. They glow in the light of gas pouring out of corona and falling into photosphere.






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






45. A star without enough mass to begin hydrogen fusion






46. 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






47. The apparent path of the Sun through the stars on the celestial sphere.






48. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core






49. 100 nm 10 nm






50. A small chunk of rock in space