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






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






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






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






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






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






7. The brightness of a star when viewed from Earth






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






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






10. All of the frequencies or wavelengths of electromagnetic radiation






11. 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






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






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






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






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






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






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






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






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






20. Influenced by Copernicus; Built observatory and collected data on the locations of stars and planets for over 20 years






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






22. An enormously bright - distant galaxy with a giant black hole at its center






23. The spinning of Earth on its axis






24. Influenced by Copernicus; Built observatory and collected data on the locations of stars and planets for over 20 years






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






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






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






28. Italian astronomer - mathematician - and physicist. His telescopes proved the sun is the center of the solar system and that the planets/moon move. He was persecuted for supporting Copernicus' ideas.






29. Brahe's assistant - German astronomer who first discovered the three laws of planetary motion (1571-1630)






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






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






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






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






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






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






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






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






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






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






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






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






42. 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






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






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






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






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






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






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






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






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