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 most distant point in the orbit of the moon






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






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






4. 23.5° - the reason we have seasons

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






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






7. Chunk of rock or dust in space






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






9. A star that falls into the main sequence category on the H-are diagram






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






11. The brilliant explosion of a dying supergiant star






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






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






14. 23.5° - the reason we have seasons

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






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






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






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






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






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






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






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






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






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






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






26. Chunk of rock or dust in space






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






28. Any natural satellite of a planet






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






30. The study of the universe






31. The brightness of a star when viewed from Earth






32. The brilliant explosion of a dying supergiant star






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






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






35. A faint star of enormous density






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

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






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






39. A star that falls into the main sequence category on the H-are diagram






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






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






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






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






45. 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.






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






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






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






49. 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






50. All of the frequencies or wavelengths of electromagnetic radiation