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. 10 nm 10^2 nm






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






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






4. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE






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






6. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE






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. A term referring to Earth-like planets






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






10. A streak of light in the atmosphere






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






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






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






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






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






16. Mercury






17. A small spherical dark nebula






18. Light-colored high-pressure bands in Jupiter's atmosphere






19. The rate of expansion of the universe.






20. Venus






21. Europa






22. A telescope that uses lenses to focus light






23. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.






24. Collections of young - hot stars






25. The high- temperatature outer layer of the sun






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






27. A collection of galaxies like the one the Milky Way belongs to






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






29. The projection of the Earth's equator onto the celestial sphere.






30. The oldest grouping of stars - found in the galaxy halo






31. 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.






32. A massive variable star used to find distances to the galaxies or clusters that contain them.






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






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






35. 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






36. 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.






37. A small and dim but hot star.






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






39. Mercury - Venus - Earth - Mars






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






41. 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






42. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.






43. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth






44. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density






45. A galaxy emitting large amounts of energy at long wavelengths.






46. Any change in the speed or direction of an object's motion






47. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu






48. The amount an image is enlarged by a telescope






49. The study of the universe as a whole.






50. The area behind a lens where images are resolved