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. The decrease in wavelength of light due to an object moving away from the oberver






2. 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.






3. A spectrum of light in which there are no gaps - so that each region blends directly into the next






4. Any of the small solid extraterrestrial bodies that hits the earth's atmosphere






5. Chunk of rock or dust in space






6. A variable star that brightens and dims regularly - or pulses - and whose distance can be determined from its period of pulsation






7. The brightness of a star when viewed from Earth






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






9. 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






10. A faint star of enormous density






11. The small - dense remains of a high-mass star after a supernova






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






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






14. All of the frequencies or wavelengths of electromagnetic radiation






15. 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.






16. The farther away a galaxy is - the faster it is moving away

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17. Chunk of rock or dust in space






18. Radiation left over from the beginning of the universe






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






20. The most distant point in the orbit of the moon






21. The spinning of Earth on its axis






22. The distance between crests of waves - such as those of the electromagnetic spectrum






23. An enormously bright - distant galaxy with a giant black hole at its center






24. Explained movement of planets with retrograde motion






25. The small - dense remains of a high-mass star after a supernova






26. Galaxy with no particular shape - contains new & old stars






27. Remnant of a star that is so dense that nothing - not even light - can escape its gravity field






28. The study of the universe






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






30. Space object made of dust and rock particles mixed with frozen water - methane - and ammonia that forms a bright coma as it approaches the Sun






31. A rapidly spinning neutron star that produces radio waves






32. The study of the universe






33. 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






34. A telescope that uses a curved mirror to collect and focus light






35. All of the frequencies or wavelengths of electromagnetic radiation






36. The apparent westward motion of the planets with respect to the stars






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






38. A star that expands and cools once it runs out of hydrogen fuel






39. An extremely bright star of very large diameter and low density






40. The apparent westward motion of the planets with respect to the stars






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






42. The rainbow effect when light is dispersed through lens






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






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






45. The blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon






46. A large cloud of dust and gas that can break apart into smaller pieces and form stars






47. Space object made of dust and rock particles mixed with frozen water - methane - and ammonia that forms a bright coma as it approaches the Sun






48. The rainbow effect when light is dispersed through lens






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






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