Test your basic knowledge |

Subject : science
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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 continuous spectrum of light missing energy at a few wave lengths.






2. Clouds of low density gas often found glowing faintly on either side of an AGN.






3. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object






4. A galaxy sending out a stream of material from its nucleus






5. 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.






6. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder






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






8. 1. We see rapid movements or high energy radiation coming at some level from the nuclei of nearly every galaxy we have looked at. 2. We suspect that the creation of these supermassive black holes is part of the galaxy formation process.






9. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this






10. Is space infinitely large?

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11. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:






12. A term referring to Jupiter-like planets






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






14. The mirror that gathers the light in a reflector






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






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






17. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites






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






19. 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.






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






21. The dark - relativley smooth areas on the moon; Latin for sea






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






23. The slow wobble of the Earth on its rotation axis.






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






25. The universe is isotropic - homogeneous - and without beginning or end in time and space. If the universe is truly homogeneous then every line of sight will eventually end on a galaxy. If it has existed forever then there has been enough time for lig

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26. Radiation given off by electrons accelerating in a magnetic field






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






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






29. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto






30. The rotation period of the Earth measured relative to the Sun.






31. Ganymede






32. Dark - reddish - low-pressure bands in Jupiter's atmosphere






33. An energetic event taking place in the early universe






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






35. 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.






36. A bridge of material held in position above the solar surface. They can remain for hours even days






37. Population 1- similar to the sun and 2% of elements are metal - Population 2- formed before gas was metal- only a fraction of mass is metal.






38. 100 nm 10 nm






39. The science of measuring the apparent magnitudes of stars by imaging them through different filters.






40. The rotation period of the Earth measured relative to the Sun.






41. Electromagnetic Radiation






42. 10^2 nm 10^7 nm






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






44. A very dense - highly populated cluster of galaxies






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






46. A word used in astronomy to describe all elements besides hydrogen and helium






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






48. An important quality of telescopes that increases as the square of the primary mirror or objective lens






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






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







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