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 small and dim but hot star.






2. The relation that tells how light dims with distance.






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






4. The dimming of starlight by intervening dust






5. 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)






6. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






7. Comglomerates of ice and rock that orbit the sun in highly elliptical paths






8. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.






9. A change in the appearance of the sun at the edge of the solar disk






10. The study of the universe as a whole.






11. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the






12. Matter that reveals itself only through its gravitational attraction.






13. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE






14. 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.






15. Any change in the speed or direction of an object's motion






16. 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)






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






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






19. The number of protons in an atom.






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






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






22. The location of a supermassive black hole






23. The apparent magnitude a star would have if it were at a distance of 10 parsecs.






24. The process similar to conduction by which energy moves from the solar core to the convective layer






25. The location around an atom where an electron resides.






26. A star without enough mass to begin hydrogen fusion






27. 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






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






29. The mirror that determines the focus configuration of a reflector






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






31. A bright area of higher temperature that often proceeds the formation of sunspots.






32. A particle of light






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






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






35. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.






36. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy






37. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.






38. 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






39. The wavelengths where a specific element can absorb or emit light.






40. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)






41. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.






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






43. The number of protons in an atom.






44. 1μm 100 nm






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






46. The apparent magnitude a star would have if it were at a distance of 10 parsecs.






47. Large nebula consisting of very cold gas and dust






48. The movement of the Earth's crustal plates riding on top of the mantle.






49. An object that may remain after a star explodes






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