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 bright area of higher temperature that often proceeds the formation of sunspots.






2. A small round distribution of gas surrounding a dying star






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






4. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)






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






6. IO






7. Is there water on the moon?






8. The rotation of a star or planet at different speeds at its equator and poles






9. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes






10. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu






11. A change in the wavelength of light caused by a motion between the observer and light (or wave) source (blue shift if getting closer - red shift if moving away)






12. When material is heated and moves taking the heat energy with it






13. A spectrum of light with energy at only a few wavelengths.






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






15. 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






16. The lens in a telescope used to determine the magnification






17. The mirror that determines the focus configuration of a reflector






18. All wavelengths of light emitted by a blackbody.






19. The shadow behind the Earth or Moon where the Sun is partially obscured.






20. Matter that reveals itself only through its gravitational attraction






21. A bridge of material held in position above the solar surface. They can remain for hours even days






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






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






24. Wave- only waves cause an interference pattern when passing through a double slit - particle- only particles deposit energy at specific locations (the way an image builds up on digital camera)






25. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






26. Neptune or uranus






27. The telescope configuration that has the focus placed at the back of the primary mirror






28. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






29. Ganymede and Titan






30. Hot cells of gas that rise and fall in the hotosphere






31. 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.






32. Dying large-mass stars lose their outer layers in a violent explosion creating large - chaotic remnants. these brighten like nova but are so much brighter and only occur ONCE PER STAR






33. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)






34. A crystalline patter found in iron meteorites






35. The rock that makes up the lunar maria






36. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)






37. A toroidal or donut-shaped collection of material attracted to a central body like a star or black hole. Dust around an object






38. A method of finding a star's distance from its absolute magnitude and spectral type or color.






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






40. A planet that is farther from the sun than the Earth is






41. The mirror that gathers the light in a reflector






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






43. Approximate speed of light in a vacuum






44. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






45. The process similar to conduction by which energy moves from the solar core to the convective layer






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






47. Centered on the sun.






48. The act of removing an electron from an atom.






49. Hydrogen and helium (mainly)






50. Europa