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






2. That which is responsible for Jupiter's magnetic field






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






4. Jupiter






5. The amount an image is enlarged by a telescope






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






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






8. A change in the wavelength of light caused by a motion between the observer and light (or wave) source (blue shift if getting closer - red shift if moving away)






9. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process






10. A fusion process in which protons build together to form helium






11. Venus (retrograde)






12. The most mass a white dwarf can have before collapsing to a neutron star






13. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.






14. Centered on the Earth






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






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

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






18. Collections of young - hot stars






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






20. The family of radiant energy that includes light as a subset






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






22. The amount an image is enlarged by a telescope






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






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






25. A prominence seen against the disk of the sun






26. Very center of galaxy. suggestion of a black hole






27. The north-south line passing directly overhead through the zenith.






28. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this






29. Is there water on the moon?






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






31. The imaginary sphere centered on the Earth that hols the stars.






32. A word meaning 'the same in all directions.'






33. A subatomic particle with a negative charge. It creates light.






34. The rate of expansion of the universe.






35. A star that is in the process of forming. It glows from gravitational contraction






36. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter






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






38. Mercury






39. The lowest energy of an atom.






40. A perfect absorber and radiator of electromagnetic radiation.






41. A distance measure determined by the shifting of a star against the background sky every 6 months.






42. A faint - remarkably uniform distribution of radiation in space






43. The shadow area behind the Earth or Moon where the Sun is completely obscured.






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






45. Why do Galaxies move very rapidly in the interiors of the dense clusters?






46. An important quality of telescopes that increases as the square of the primary mirror or objective lens






47. What are the three possible geometries of the universe?






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






49. The law stating that hotter blackbodies look bluer than cooler blackbodies.

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