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






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






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






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






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






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






7. Chunk of rock or dust in space






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






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






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






11. All of the frequencies or wavelengths of electromagnetic radiation






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






13. A faint star of enormous density






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






15. The study of the universe






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






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






18. The brilliant explosion of a dying supergiant star






19. Explained movement of planets with retrograde motion






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






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






22. A galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern






23. 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






24. A rapidly spinning neutron star that produces radio waves






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






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






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






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






29. The rainbow effect when light is dispersed through lens






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






31. Chunk of rock or dust in space






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






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






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






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

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






37. The spinning of Earth on its axis






38. Radiation left over from the beginning of the universe






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






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






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






42. A rapidly spinning neutron star that produces radio waves






43. 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.






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






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






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






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






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






49. 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






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