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






2. The science of measuring light energy by wavelength.






3. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals






4. Possible Fates of the Universe






5. Ganymede and Titan






6. In what chemical form are jupiters nitrogen - carbon and oxygen?






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






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






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






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






11. The part of the Milky way that has on-going star formation






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






13. VENUS






14. A very dense - highly populated cluster of galaxies






15. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






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. That which is responsible for Jupiter's magnetic field






18. When one side of a body always faces the planet it revolves around






19. Half of the longest diameter across an ellipse






20. A large and bright but cool star.






21. 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 _____.






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






23. A representation of the changes in color and brightness of an evolving protostar.






24. The number of protons in an atom.






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






26. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use






27. A small round distribution of gas surrounding a dying star






28. The mass of an object divided by its volume






29. Infinitely long -> 10 cm






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






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






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






33. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant






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






35. Venus






36. A plot of star absolute magnitude verses spectral type.






37. The rock that makes up the lunar highlands






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






39. A star without enough mass to begin hydrogen fusion






40. 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






41. The distance between a lens and its focal plane






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






43. The location of a supermassive black hole






44. A planet orbiting about a distant star






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






46. Jupiter






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






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






49. Mercury






50. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE