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






2. 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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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

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22. 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






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






24. The brightness of a star when viewed from Earth






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






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






27. 23.5° - the reason we have seasons

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28. The study of the universe






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






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






31. A rapidly spinning neutron star that produces radio waves






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






33. 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






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






35. 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






36. The spinning of Earth on its axis






37. A star that ejects some of its material in the form of a cloud and become more luminous in the process






38. Any natural satellite of a planet






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






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






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






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






43. 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






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






45. A star that ejects some of its material in the form of a cloud and become more luminous in the process






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






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






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






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






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







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


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