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 planet orbiting about a distant star






2. 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.






3. Comglomerates of ice and rock that orbit the sun in highly elliptical paths






4. 10 nm 10^2 nm






5. 10 cm -> 1 mm






6. The average distance between the Earth and the Sun (=1.5 x10^8km)






7. Material that shoots rapidly out into space. Flares cause Auroras






8. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.

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






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






11. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter






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






13. Wave- only waves cause an interference pattern when passing through a double slit - particle- only particles deposit energy at specific locations (the way an image builds up on digital camera)






14. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use






15. The apparent magnitude a star would have if it were at a distance of 10 parsecs.






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






17. Where is the center of the expansion






18. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






19. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.






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






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






22. 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.






23. Venus






24. 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






25. A representation of the changes in color and brightness of an evolving protostar.






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






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






28. 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)






29. What Ole Roemer used to measure the speed of light in a vacuum






30. A star that is in the process of forming. It glows from gravitational contraction






31. Neptune or uranus






32. A small and dim but hot star.






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






34. The lens that gathers the light in a refractor






35. Collections of young - hot stars






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






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






38. Hydrogen and helium (mainly)






39. Light scattered through the atmosphere that degrades astronomical images






40. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.






41. Young clusters in disk are irregularly shaped since they have no time to relax into the rounder relaxed shape of globular clusters-will constantly be torn apart and assimilated.






42. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.






43. In what chemical form are jupiters nitrogen - carbon and oxygen?






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






45. The mirror that gathers the light in a reflector






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






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






48. A location on an H-are Diagram where evolving stars pulsate






49. The distance between a lens and its focal plane






50. 1μm 100 nm