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. The dimming of starlight by intervening dust






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






3. Sc galaxies






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






5. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction






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






7. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc






8. Infinitely long -> 10 cm






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






10. Moon in less than the angular diameter of the Sun.






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






12. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)






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






14. Centered on the Earth






15. A repeated - periodic push or pull capable of summing into a larger push or pull






16. Venus






17. A perfect absorber and radiator of electromagnetic radiation.






18. The act of removing an electron from an atom.






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






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






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


22. Dark areas on the sun that are cooler than the surrounding photosphere






23. The elementary building blocks from which protons and neutrons are formed.






24. A small and dim but hot star.






25. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






26. The science of measuring light energy by wavelength.






27. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape






28. The larger bodies that formed early in teh solar nebula that were chemically differentiated






29. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)






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. A measure of the ability of a telescope to see fine detail






32. A very dense - highly populated cluster of galaxies






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






34. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker






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






36. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.






37. A planet that is closer to the sun than the earth






38. 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






39. The high- temperatature outer layer of the sun






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






41. Venus (retrograde)






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






43. A volume of space where few - if any - galaxies are located






44. The distance a moon can be from a planet before shattering from tidal forces






45. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)






46. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.






47. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)






48. The point in its orbit where a planet is farthest from the sun






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






50. 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.