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 spectrum of light with energy at only a few wavelengths.






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






3. An empirical scheme for predictin ghe orbital distances of planets






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


5. A star without enough mass to begin hydrogen fusion






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






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






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






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






10. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.






11. Ganymede






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






13. The point in its orbit where a planet is nearest the sun






14. The law that describes the blackbody curve - and let to quantum mechanics.


15. 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






16. Venus (retrograde)






17. A streak of light in the atmosphere






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






19. 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.






20. A telescope that uses mirrors to focus light






21. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)






22. Neptune or uranus






23. A star that erratically and explosively brightens and dims






24. A distance measure determined by the shifting of a star against the background sky every 6 months.






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






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






27. A perfect absorber and radiator of electromagnetic radiation.






28. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie


29. 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.






30. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.






31. The study of the universe as a whole.






32. Matter that reveals itself only through its gravitational attraction.






33. The process that powers the sun and hydrogen bombs






34. Centered on the sun.






35. A particle of light






36. A telescope that uses lenses to focus light






37. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas






38. 1μm 100 nm






39. A planet that is farther from the sun than the Earth is






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






41. The point in its orbit where a planet is nearest the sun






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






43. The fusion process that turns three helium nuclei into a carbon nucleus






44. Form honeycomb like patterns surrounding empty or nearly empty voids.






45. Venus






46. 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.






47. Is space infinitely large?


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






49. 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.






50. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.