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






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






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






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






5. The study of the universe






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






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






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






9. The spinning of Earth on its axis






10. 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






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






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






13. Polish astronomer who produced a workable model of the solar system with the sun in the center (1473-1543)






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






15. A faint star of enormous density






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






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






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

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






20. 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






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






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






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






24. The luminous cloud of particles surrounding the frozen nucleus of a comet






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






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

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






28. The rainbow effect when light is dispersed through lens






29. 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






30. Light distance travels in one year (9.5 trillion km)






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






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






33. Explained movement of planets with retrograde motion






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






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






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






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






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






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






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






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






42. 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






43. The luminous cloud of particles surrounding the frozen nucleus of a comet






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






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






46. A star that falls into the main sequence category on the H-are diagram






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

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






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






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







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


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