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






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






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






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






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






6. Explained movement of planets with retrograde motion






7. The place in the orbit of a planet where the planet is farthest from the sun






8. One of the small asteroid-like bodies that formed the building blocks of the planets






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






10. A contracting cloud of gas and dust with enough mass to form a star






11. The brilliant explosion of a dying supergiant star






12. The spinning of Earth on its axis






13. The two days of the year on which neither hemisphere is tilted toward or away from the sun






14. The rainbow effect when light is dispersed through lens






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






16. The study of the universe






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






18. The elliptical motion of a body as it orbits another body in space






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






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






21. 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






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






23. All of the frequencies or wavelengths of electromagnetic radiation






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

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






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






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






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






29. The elliptical motion of a body as it orbits another body in space






30. The study of the universe






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






32. 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






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






34. Radiation left over from the beginning of the universe






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






36. A faint star of enormous density






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






38. Light distance travels in one year (9.5 trillion km)






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






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






41. A faint star of enormous density






42. Any natural satellite of a planet






43. A region of the solar system that is just beyond the orbit of neptune and that contains small bodies made mostly of ice






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






45. A graph relating the temperature and brightness of stars






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






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






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






50. 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.