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. A planet orbiting about a distant star






2. Where is the center of the expansion






3. The surface of the sun






4. The place in the sky that the Earth's axis points toward (can be either north or south)






5. Rich= dense crowded cores of galaxies - poor= few members and a looser organization of galaxies






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






7. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.






8. The law that describes the blackbody curve - and let to quantum mechanics.

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9. The apparent backward motion of a planet against the background of stars.






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






11. A word meaning 'the same in all directions.'






12. Venus






13. The point directly overhead.






14. The layer of the sun just above the photosphere






15. Europa






16. The apparent magnitude a star would have if it were at a distance of 10 parsecs.






17. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






18. 1μm 100 nm






19. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.






20. Centered on the sun.






21. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies






22. Mercury






23. When massive objects bend space and time enough to create multiple images of an object located behind them






24. Distribution of dust (tells us disk is thin) - find distances to O&B stars and H2 regions (arms are sights of star formation and OB stars live and die at location of birth) -Milky way has four arms. Sun is in spur apart from arms.






25. The science of measuring the apparent magnitudes of stars by imaging them through different filters.






26. 10 cm -> 1 mm






27. 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.






28. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.






29. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.






30. The mirror that gathers the light in a reflector






31. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






32. The science of measuring light energy by wavelength.






33. A perfect absorber and radiator of electromagnetic radiation.






34. Distribution of dust (tells us disk is thin) - find distances to O&B stars and H2 regions (arms are sights of star formation and OB stars live and die at location of birth) -Milky way has four arms. Sun is in spur apart from arms.






35. 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.






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






37. Infinitely long -> 10 cm






38. 10^2 nm 10^7 nm






39. The projection of the Earth's equator onto the celestial sphere.






40. The oldest terrain on the moon






41. The lens that gathers the light in a refractor






42. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)






43. Sc galaxies






44. Possible Fates of the Universe






45. A quantity measuring the stability of the Earth's atmosphere






46. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)






47. The location in an H-are diagram of a star cluster - where stars have just left the main sequence. Used to estimate the cluster age.






48. Then the Sun moves from north to south across the celestial equator (about September 23)






49. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use






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