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 location on an H-are Diagram where evolving stars pulsate






2. Ganymede and Titan






3. A prominence seen against the disk of the sun






4. Sc galaxies






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






6. 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






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






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






9. 1μm 100 nm






10. Population 1- similar to the sun and 2% of elements are metal - Population 2- formed before gas was metal- only a fraction of mass is metal.






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






12. The process of acquiring material






13. The part of the Milky way that has on-going star formation






14. What causes the zones and belts on jupiter and saturn?






15. Light scattered through the atmosphere that degrades astronomical images






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






17. The number of protons in an atom.






18. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie

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19. 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.






20. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.






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






22. What do we think the actual fate of the universe will be and why do we think this?






23. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids






24. 10^2 nm 10^7 nm






25. The seasonal shifting of a nearby star's position relative to more distant objects.






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






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






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






29. A faint - remarkably uniform distribution of radiation in space






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






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

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






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






34. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere






35. A planet that is closer to the sun than the earth






36. A massive variable star used to find distances to the galaxies or clusters that contain them.






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






38. Centered on the sun.






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






40. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






41. Either Io -Europa - Ganymede - or Callisto






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






43. The high- temperatature outer layer of the sun






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






45. 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)






46. Venus






47. A push or a pull






48. 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






49. The point in its orbit where a planet is farthest from the sun






50. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula