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






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






3. Chunk of rock or dust in space






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






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






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






7. A spherical region of comets that surrounds the solar system






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






9. Polish astronomer who produced a workable model of the solar system with the sun in the center (1473-1543)






10. The spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths






11. The brilliant explosion of a dying supergiant star






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






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






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






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






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






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






18. The spinning of Earth on its axis






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






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






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






22. The brilliant explosion of a dying supergiant star






23. The study of the universe






24. A faint star of enormous density






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






26. The rainbow effect when light is dispersed through lens






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






28. The study of the universe






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






30. All of the frequencies or wavelengths of electromagnetic radiation






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






32. 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.






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






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






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






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






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






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






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






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






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






42. The comet discovered in 1705 that repeats itself every 76 years and last appeared in 1986.

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43. 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






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






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






46. 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.






47. 23.5° - the reason we have seasons

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48. The theory that the universe originated 20 billion years ago from the cataclysmic explosion of a small mass of matter at extremely high density and temperature






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






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