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






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






3. All of the frequencies or wavelengths of electromagnetic radiation






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






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






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






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






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






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






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






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






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






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






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






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






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






17. 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






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






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






20. 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






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






22. Chunk of rock or dust in space






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






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






25. A faint star of enormous density






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






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






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






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






30. Radiation left over from the beginning of the universe






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






32. The study of the universe






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






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






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






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






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






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






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






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






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

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






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

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






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






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






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






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. Any substance that cannot be broken down into simpler substances







Sorry!:) No result found.

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