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. Chunk of rock or dust in space






2. The rainbow effect when light is dispersed through lens






3. All of the frequencies or wavelengths of electromagnetic radiation






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






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






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






7. Explained movement of planets with retrograde motion






8. 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






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






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






11. Any natural satellite of a planet






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






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






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






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

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






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






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






19. 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.






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






21. A space telescope and camera named for a famous astronaut (Edward Hubble) used to study space elements






22. The study of the universe






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






24. 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






25. 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.






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






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






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






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






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






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






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






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






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






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






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






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






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






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






40. The rainbow effect when light is dispersed through lens






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






42. 23.5° - the reason we have seasons

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






44. The brightness of a star when viewed from Earth






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






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






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






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






49. A faint star of enormous density






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