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. A system of galaxies containing from several to thousands of member galaxies






2. A faint star of enormous density






3. The theory that states that gravity will over come the expansion of the universe and bring everything together in an implosion






4. An elongated circle - or oval shape - the shape of the planets orbit






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






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






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






8. 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






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






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






11. A particle of electromagnetic radiation having zero mass and carrying a quantum of energy






12. An immense cloud of gas (mainly hydrogen) and dust in interstellar space






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






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

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15. A star that ejects some of its material in the form of a cloud and become more luminous in the process






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






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






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






19. Massive clouds of dust and gases where stars are born






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






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






22. A group of stars that form a pattern in the sky






23. A rapidly spinning neutron star that produces radio waves






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






25. The study of the universe






26. A particle of electromagnetic radiation having zero mass and carrying a quantum of energy






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






28. Change in the apparent frequency of a wave as observer and source move toward or away from each other






29. A rapidly spinning neutron star that produces radio waves






30. The theory that states that gravity will over come the expansion of the universe and bring everything together in an implosion






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






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






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






34. The spinning of Earth on its axis






35. Point in orbit that is closest to the sun - planet moves faster






36. English mathematician and physicist - discovered the law of universal gravitation






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






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






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






40. Any natural satellite of a planet






41. 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






42. A large body in space that orbits a star and does not produce light of its own






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






44. Any substance that cannot be broken down into simpler substances






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






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






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






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






49. English mathematician and physicist - discovered the law of universal gravitation






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