Test your basic knowledge |

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. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t






2. The movement of the Earth's crustal plates riding on top of the mantle.






3. The process of acquiring material






4. The science of measuring light energy by wavelength.






5. The force of attraction between any two objects having mass






6. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)






7. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)






8. Small moons that maintain the shape of rings around Saturn and Uranus






9. An empirical scheme for predictin ghe orbital distances of planets






10. The first rock-sized bodies that formed in the solar nebula from dust grains






11. When one side of a body always faces the planet it revolves around






12. The equation that describes how matter equates with energy






13. Long - meandering cliff formed when a planet surface cools and shrinks






14. The particle horizon is the farthest we can see. It exists because the universe had a beginning and thus a definite age. Light from distances farther away from the particle horizon have not had time to reach us yet.






15. Mercury






16. A star that erratically and explosively brightens and dims






17. The distance light travels in one year (=9.46x10^12km).






18. A location on an H-are Diagram where evolving stars pulsate






19. The 'edge' of the universe. Light beyond this has not reached us yet.






20. The sinking of denser elements to the center of a young molten planet






21. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






22. When the Sun moves from south to north across the celestial equator (about March 21)






23. The measure of a variable star's apparent magnitude as it brightens and dims with time






24. The source of the force that is accelerating the expansion rate of the universe.






25. The dimming of starlight by intervening dust






26. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes






27. How did Earth come to have an oxygen rich atmosphere?






28. A continuous spectrum of light missing energy at a few wave lengths.






29. A galaxy emitting large amounts of energy at long wavelengths.






30. The elementary building blocks from which protons and neutrons are formed.






31. Jupiter - Saturn - Uranus - Neptune






32. Mercury - Venus - Earth - Mars






33. Electromagnetic Radiation






34. The first rock-sized bodies that formed in the solar nebula from dust grains






35. The oldest grouping of stars - found in the galaxy halo






36. The process that powers the sun and hydrogen bombs






37. The cosmological principle is the assumption that the universe is isotropic and homogeneous.The Big Bang assumes it to be a correct principle so that what we observe is exactly like What is too far away to be observed.






38. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas






39. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t






40. A crystalline patter found in iron meteorites






41. The imaginary sphere centered on the Earth that hols the stars.






42. 10 cm -> 1 mm






43. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas






44. Why does the earth have few craters while the moon has many?






45. A collection of galaxies like the one the Milky Way belongs to






46. Ancient stream channels - flood planes - and sedimentary-type rock. Frozen water is found in the polar ice caps and in the soil.






47. The light produced when particles from the sun collide with atmospheric molecules






48. Form honeycomb like patterns surrounding empty or nearly empty voids.






49. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density






50. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)






Can you answer 50 questions in 15 minutes?



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