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






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






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






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






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






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






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

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






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






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






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






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






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






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






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






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






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






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






19. The study of the spectra of stars by analyzing the spectral properties of the light they give off






20. 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






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

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






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






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






25. The brilliant explosion of a dying supergiant star






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






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






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






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






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






31. The rainbow effect when light is dispersed through lens






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






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






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






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






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






37. 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






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






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






40. Any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)






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






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






43. The study of the spectra of stars by analyzing the spectral properties of the light they give off






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






45. Any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)






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






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






48. Any natural satellite of a planet






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






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