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. 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






2. What do we think the actual fate of the universe will be and why do we think this?






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






4. When a planet lines up with the sun inthe sky






5. Jupiter






6. A particle of light.






7. 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






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. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.






10. Small moons that maintain the shape of rings around Saturn and Uranus






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






12. The sinking of denser elements to the center of a young molten planet






13. IO






14. A star that erratically and explosively brightens and dims






15. The mass of an object divided by its volume






16. 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.






17. When massive objects bend space and time enough to create multiple images of an object located behind them






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






19. 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.






20. 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.






21. Possible Fates of the Universe






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. The organization of clusters of galaxies into sheets and strings






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






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






26. A small and dim but hot star.






27. Mercury






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






29. 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.






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






31. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)






32. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.






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






34. 10 nm 10^2 nm






35. A streak of light in the atmosphere






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






37. The distance light travels in one year (=9.46x10^12km).






38. An entity that is likely in the nucleus of most - if not all - galaxies.






39. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.






40. The science of measuring light energy by wavelength.






41. The high- temperatature outer layer of the sun






42. The apparent backward motion of a planet against the background of stars.






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






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






45. When material is heated and moves taking the heat energy with it






46. Venus






47. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes






48. A very dense - highly populated cluster of galaxies






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






50. Heavier elements such as iron - silicon - magnesium - sulfer - nickel