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






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






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






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






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






6. 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






7. 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






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






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






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






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

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






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






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






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






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






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






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






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






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






21. A graph relating the temperature and brightness of stars






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






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






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






25. 23.5° - the reason we have seasons

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26. Massive clouds of dust and gases where stars are born






27. The average distance between the Earth and the sun - or approximately 150000000 km






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






29. The rainbow effect when light is dispersed through lens






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






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






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






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






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






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






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






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






38. Astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extra-terrestrial sources






39. The average distance between the Earth and the sun - or approximately 150000000 km






40. Radiation left over from the beginning of the universe






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






42. Any natural satellite of a planet






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






44. The brightness of a star when viewed from Earth






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






46. The brilliant explosion of a dying supergiant star






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






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






49. A faint star of enormous density






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