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 luminous cloud of particles surrounding the frozen nucleus of a comet






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






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






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






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






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






7. A faint star of enormous density






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






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






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






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






12. A variable star that brightens and dims regularly - or pulses - and whose distance can be determined from its period of pulsation






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






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






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






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






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






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






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






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






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






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






23. A faint star of enormous density






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






25. A shift toward the red end of the spectrum in the observed spectral lines of stars or galaxies showing objects are moving away and that the universe is expanding






26. The rainbow effect when light is dispersed through lens






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






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






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






30. 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






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






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

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






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






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






36. Brahe's assistant - German astronomer who first discovered the three laws of planetary motion (1571-1630)






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






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






39. A rapidly spinning neutron star that produces radio waves






40. Any of the small solid extraterrestrial bodies that hits the earth's atmosphere






41. Explained movement of planets with retrograde motion






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






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






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






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






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






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






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






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.