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






2. The brightness of a star when viewed from Earth






3. The brightness of a star when viewed from Earth






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






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






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






7. Chunk of rock or dust in space






8. 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






9. Any natural satellite of a planet






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






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






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






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






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






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






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






18. The rainbow effect when light is dispersed through lens






19. Chunk of rock or dust in space






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






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






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

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






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






25. 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






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






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






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






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






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






31. A faint star of enormous density






32. The brilliant explosion of a dying supergiant star






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






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






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






36. 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






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






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






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






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






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






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






43. A very small star with low temperature - reddish in color






44. 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






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






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






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






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






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






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






Can you answer 50 questions in 15 minutes?



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