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 lens that gathers the light in a refractor






2. A planet orbiting about a distant star






3. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






4. Norhern lowlands- darker in color and have far fewer craters as if an ancient sea or ice field covered them. southern highlands- much higher in density of craters.






5. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker






6. Distance from sun to nucleus- 8 kiloparsecs (26000 LY) - diameter of Milky way- 150000 LY - length for sun to orbit once around milky way- 250 million years






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






8. The rotation of a star or planet at different speeds at its equator and poles






9. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)






10. A continuous spectrum of light missing energy at a few wave lengths.






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






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






13. When the Moon entirely blocks the Sun.






14. Mercury - Venus - Earth - Mars






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






16. The place in the sky that the Earth's axis points toward (can be either north or south)






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






18. An empirical scheme for predictin ghe orbital distances of planets






19. The equation that describes how matter equates with energy






20. The projection of the Earth's equator onto the celestial sphere.






21. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder






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






23. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes






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






25. A huge sphere of tenuous gas surrounding the nucleus of a comet






26. A method of finding a star's distance from its absolute magnitude and spectral type or color.






27. Mercury






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






29. A small spherical dark nebula






30. 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.






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






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






33. A toroidal or donut-shaped collection of material attracted to a central body like a star or black hole. Dust around an object






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






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






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






37. Titan






38. The shadow behind the Earth or Moon where the Sun is partially obscured.






39. The apparent path of the Sun through the stars on the celestial sphere.






40. A small and dim but hot star.






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






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






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






44. A galaxy emitting large amounts of energy at long wavelengths.






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






46. Then the Sun moves from north to south across the celestial equator (about September 23)






47. The lens in a telescope used to determine the magnification






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






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






50. An object that may remain after a star explodes