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 location on an H-are Diagram where evolving stars pulsate






2. Venus






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






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






5. The oldest grouping of stars - found in the galaxy halo






6. Light-colored high-pressure bands in Jupiter's atmosphere






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






8. 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






9. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






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






11. 10^2 nm 10^7 nm






12. 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






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






14. The high- temperatature outer layer of the sun






15. The number of protons in an atom.






16. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation






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






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






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






20. The force of attraction between any two objects having mass






21. The law that predicts the possible types of spectra.

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22. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)






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






24. Hydrogen and helium (mainly)






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






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






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






28. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)






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






30. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.






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






32. A location on an H-are Diagram where evolving stars pulsate






33. What causes the zones and belts on jupiter and saturn?






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






35. A very dense - highly populated cluster of galaxies






36. A quantity measuring the stability of the Earth's atmosphere






37. Mercury and venus






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






39. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)






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






41. Venus (retrograde)






42. Mercury - Venus - Earth - Mars






43. A point in the sky where meteors appear to come from during a shower






44. The location of a supermassive black hole






45. 10^2 nm 10^7 nm






46. A very dense - highly populated cluster of galaxies






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






48. The layer of the sun just above the photosphere






49. The measure of a variable star's apparent magnitude as it brightens and dims with time






50. An evolved star - past the helium flash that is burning helium to carbon in it's cores