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






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






3. The amount an image is enlarged by a telescope






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






5. An energetic event taking place in the early universe






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






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






8. 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.






9. Is there water on the moon?






10. The lens that gathers the light in a refractor






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






12. A streak of light in the atmosphere






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






14. A small spherical dark nebula






15. The displacement of spectral lines to redder colors caused by the expansion of the universe.






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






17. The rock that makes up the lunar maria






18. A particle of light






19. A subatomic particle with a negative charge. It creates light.






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






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






22. 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






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






24. 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 _____.






25. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE






26. The temp at which a substance in the vacuum of space solidifies






27. The process responsible for creating the arms of flocculent spiral galaxies






28. Centered on the Earth






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






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






31. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy






32. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core






33. Orbit in Jupiters orbit






34. A telescope that uses mirrors to focus light






35. Venus






36. Mercury






37. The powdered stone fragments that make up the lunar 'soil'






38. A huge sphere of tenuous gas surrounding the nucleus of a comet






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






40. The entity responsible for spiral arms in grand-design spiral galaxies






41. The organization of clusters of galaxies into sheets and strings






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






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






44. A very dense - highly populated cluster of galaxies






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






46. Hydrogen and helium (mainly)






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






48. The lens in a telescope used to determine the magnification






49. All wavelengths of light emitted by a blackbody.






50. The imaginary sphere centered on the Earth that hols the stars.