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. 1 mm 1μm






2. 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






3. The location of a supermassive black hole






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






5. The number of protons in an atom.






6. A push or a pull






7. A point in the sky where meteors appear to come from during a shower






8. A term referring to the orbital character of stars near the Sun






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






10. The displacement of spectral lines to redder colors caused by the expansion of the universe.






11. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation






12. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.

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13. A particle of light






14. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation






15. First accurately measured the speed of light in a vacuum






16. An important quality of telescopes that increases as the square of the primary mirror or objective lens






17. The process responsible for creating the arms of flocculent spiral galaxies






18. A telescope that uses lenses to focus light






19. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.






20. A term referring to Earth-like planets






21. Half of the longest diameter across an ellipse






22. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.






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






24. A particle of light.






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






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






27. 10 nm 10^2 nm






28. 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.






29. A streak of light in the atmosphere






30. Venus






31. What Ole Roemer used to measure the speed of light in a vacuum






32. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites






33. When the Sun is farthest south of the celestial equator (About December 22)






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






35. Radiation given off by electrons accelerating in a magnetic field






36. A measure of the ability of a telescope to see fine detail






37. Ganymede






38. A telescope that uses mirrors to focus light






39. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting






40. A star fusing hydrogen to helium in it's core






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






42. The name for the only seriously considered theory of the universe.






43. A volume of space where few - if any - galaxies are located






44. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.






45. An entity that is likely in the nucleus of most - if not all - galaxies.






46. Poitns of gravitational stability in the orbit of a planet






47. A measure of the ability of a telescope to see fine detail






48. Light-colored high-pressure bands in Jupiter's atmosphere






49. 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)






50. The process of acquiring material