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






2. The process that powers the sun and hydrogen bombs






3. 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.






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






5. Approximate speed of light in a vacuum






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






7. A small spherical dark nebula






8. Clouds of low density gas often found glowing faintly on either side of an AGN.






9. An energetic event taking place in the early universe






10. Large nebula consisting of very cold gas and dust






11. Europa






12. In what chemical form are jupiters nitrogen - carbon and oxygen?






13. The lowest energy of an atom.






14. A subatomic particle with a negative charge. It creates light.






15. The rotation period of the Earth measured relative to the Sun.






16. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)






17. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)






18. The crust of a meteorite caused by its entry into Earth's atmosphere






19. Ganymede






20. A prominence seen against the disk of the sun






21. Where is the center of the expansion






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






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






24. 1. We see rapid movements or high energy radiation coming at some level from the nuclei of nearly every galaxy we have looked at. 2. We suspect that the creation of these supermassive black holes is part of the galaxy formation process.






25. A star that is burning hydrogen to helium in a shell surrounding it's core






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






27. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:






28. Mercury






29. 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






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






31. 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






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






33. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker






34. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant






35. A particle of light






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






37. A crystalline patter found in iron meteorites






38. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the






39. A small and dim but hot star.






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






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






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






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






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






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






46. A particle of light.






47. 1μm 100 nm






48. Where is the center of the expansion






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






50. Venus







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Can you answer 50 questions in 15 minutes?


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