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






2. Jupiter






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






4. A bright area of higher temperature that often proceeds the formation of sunspots.






5. Electromagnetic Radiation






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






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






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






9. The point directly overhead.






10. Centered on the Earth






11. 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






12. Elliptical orbits that come inside orbit of the Earth.






13. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






14. A prominence seen against the disk of the sun






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






16. 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.






17. Then the Sun moves from north to south across the celestial equator (about September 23)






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






19. Where is the center of the expansion






20. The sinking of denser elements to the center of a young molten planet






21. The powdered stone fragments that make up the lunar 'soil'






22. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.






23. 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.






24. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






25. The process of acquiring material






26. 100 nm 10 nm






27. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE






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






29. The place in the sky that the Earth's axis points toward (can be either north or south)






30. An object that may remain after a star explodes






31. Neptune or uranus






32. When particles are compressed to an unnatural state where their pressure is not related to their temperature






33. When the Moon entirely blocks the Sun.






34. 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






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






36. A younger cluster of stars - found in the galaxy disk






37. 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.






38. Where is the center of the expansion






39. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)






40. An energetic event taking place in the early universe






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






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






43. Sc galaxies






44. A telescope that uses mirrors to focus light






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






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






47. A quantity measuring the stability of the Earth's atmosphere






48. The relation that tells how light dims with distance.






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






50. 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)