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






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






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






4. The motion of a spinning body (as a top) in which it wobbles so that the axis of rotation sweeps out a cone






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






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

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






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






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






10. Chunk of rock or dust in space






11. 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






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






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






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






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






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






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






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






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






20. 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






21. The brightness of a star when viewed from Earth






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






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






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






25. A faint star of enormous density






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






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






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






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






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






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






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






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






34. The formation of a celestial object by the effect of gravity pulling together surrounding objects and gases






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






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






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

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38. Explained movement of planets with retrograde motion






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






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

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






42. A graph relating the temperature and brightness of stars






43. The rainbow effect when light is dispersed through lens






44. Explained movement of planets with retrograde motion






45. The elliptical motion of a body as it orbits another body in space






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






47. 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






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






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






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