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






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






3. An immense cloud of gas (mainly hydrogen) and dust in interstellar space






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






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






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






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






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






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






10. An immense cloud of gas (mainly hydrogen) and dust in interstellar space






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






12. The brightness of a star when viewed from Earth






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






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






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






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






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






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






19. The rainbow effect when light is dispersed through lens






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






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






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






23. 23.5° - the reason we have seasons

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






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






26. 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






27. The spinning of Earth on its axis






28. The rainbow effect when light is dispersed through lens






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






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






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






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






33. The brilliant explosion of a dying supergiant star






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






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






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






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






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






39. Any natural satellite of a planet






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






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






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






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






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






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






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






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

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






49. The brightness of a star when viewed from Earth






50. 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