Test your basic knowledge |

Astronomy Basics

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. All of the frequencies or wavelengths of electromagnetic radiation






2. Varying amounts of the lighted moon as seen from earth






3. Radiation left over from the beginning of the universe






4. The study of the universe






5. A model of the solar system in which Earth and the other planets revolve around the sun






6. The apparent change in position of an object when seen from different places






7. A measure of the amount of light that a star actually emits






8. Optical telescope that has a large convex lens that produces an image that is viewed through the eyepiece






9. The name of our galaxy - a spiral galaxy that contains about 400 billion stars






10. A faint star of enormous density






11. A model of the solar system in which Earth and the other planets revolve around the sun






12. The comet discovered in 1705 that repeats itself every 76 years and last appeared in 1986.

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13. When the moon passes between earth and the sun - blocking the sunlight from reaching earth






14. Point of moon's orbit when it is nearest the earth






15. The motion of a spinning body (as a top) in which it wobbles so that the axis of rotation sweeps out a cone






16. Planets with low densities and are huge gas giants. Jupiter - Saturn - Uranus - Neptune






17. A rapidly spinning neutron star that produces radio waves






18. Italian astronomer - mathematician - and physicist. His telescopes proved the sun is the center of the solar system and that the planets/moon move. He was persecuted for supporting Copernicus' ideas.






19. Spectrum of electromagnetic radiation emitted by a self-luminous source






20. A shift toward the red end of the spectrum in the observed spectral lines of stars or galaxies showing objects are moving away and that the universe is expanding






21. Point of moon's orbit when it is nearest the earth






22. Large group of stars - dust - and gas held together by gravity; can be elliptical - spiral - or irregular






23. The increase in wavelength of light due to an object moving away from the observer






24. A shift toward the red end of the spectrum in the observed spectral lines of stars or galaxies showing objects are moving away and that the universe is expanding






25. The average distance between the Earth and the sun - or approximately 150000000 km






26. The rainbow effect when light is dispersed through lens






27. Influenced by Copernicus; Built observatory and collected data on the locations of stars and planets for over 20 years






28. Explained movement of planets with retrograde motion






29. Stony or metallic object that is the remains of a meteoroid that has reached the earth's surface






30. The study of the spectra of stars by analyzing the spectral properties of the light they give off






31. A model of the universe based on the assumption that the sun - moon - and planets all orbit Earth






32. The spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths






33. The brightness of a star when viewed from Earth






34. A system of two stars that revolve around each other under their mutual gravitation






35. A very small star with low temperature - reddish in color






36. A group of about 30 galaxies that includes the Milky Way






37. A spherical region of comets that surrounds the solar system






38. The formation of a celestial object by the effect of gravity pulling together surrounding objects and gases






39. Large group of stars - dust - and gas held together by gravity; can be elliptical - spiral - or irregular






40. A galaxy shaped like a flattened ball - containing only old stars






41. Stony or metallic object that is the remains of a meteoroid that has reached the earth's surface






42. Planet with a solid - rocky crust; more dense; Inner planet. Mercury - Venus - Earth - Mars






43. Any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)






44. When the northern or southern most point on earth receives the most sun because the earth is tilted toward the sun






45. All of the frequencies or wavelengths of electromagnetic radiation






46. A measure of the amount of light that a star actually emits






47. The spinning of Earth on its axis






48. Every object in the universe was attracted to every other object w/ a force that is directly proportional to the masses and proportional to distance between them






49. Planets with low densities and are huge gas giants. Jupiter - Saturn - Uranus - Neptune






50. The luminous cloud of particles surrounding the frozen nucleus of a comet