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 technique using computer-controlled mirrors to sharpen images distorted by the atmosphere






2. Mercury






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






4. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)






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






6. The rock that makes up the lunar highlands






7. The process that powers the sun and hydrogen bombs






8. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






9. A star that blows itself apart






10. 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.






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






12. When the Sun moves from south to north across the celestial equator (about March 21)






13. The normal eastward movement of a planet against the background of hte distant stars.






14. An energetic event taking place in the early universe






15. A small and dim but hot star.






16. A spinning neutron star






17. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.






18. The oldest part of the Milky Way






19. A spectrum of light with energy at only a few wavelengths.






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






21. The apparent path of the Sun through the stars on the celestial sphere.






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






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






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






25. Jupiter






26. 10^2 nm 10^7 nm






27. How is the Hubble Law consistent with an expanding universe?






28. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula






29. A word meaning 'the same everywhere throughout.'






30. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.






31. The high- temperatature outer layer of the sun






32. Centered on the Earth






33. Centered on the sun.






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






35. A star fusing hydrogen to helium in it's core






36. Venus






37. Is space infinitely large?

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38. The shadow area behind the Earth or Moon where the Sun is completely obscured.






39. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process






40. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






41. The most mass a white dwarf can have before collapsing to a neutron star






42. 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






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






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






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






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






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






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






49. Mercury






50. The normal eastward movement of a planet against the background of hte distant stars.