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. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)






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






3. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process






4. A rock or iron specimen that has fallen from space






5. Ganymede






6. 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)






7. 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.






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






9. Saturn






10. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






11. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE






12. The equation that describes how matter equates with energy






13. The entity from which the whole universe is postulated to have come from.






14. A telescope that uses mirrors to focus light






15. 1 mm 1μm






16. 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.






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






18. The lowest energy of an atom.






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






20. A phenomenon seen when the Earth passes through the orbit of a burned out comet






21. A change in the appearance of the sun at the edge of the solar disk






22. 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






23. The process that powers the sun and hydrogen bombs






24. The lens that gathers the light in a refractor






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






26. All wavelengths of light emitted by a blackbody.






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






28. 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)






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






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






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






32. 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.






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






34. 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)






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






36. Jupiter






37. Material that shoots rapidly out into space. Flares cause Auroras






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






39. 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






40. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






41. Any class of objects with a uniform luminosity used to determine distance.






42. A prominence seen against the disk of the sun






43. A term referring to Earth-like planets






44. The powdered stone fragments that make up the lunar 'soil'






45. An energetic event taking place in the early universe






46. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.






47. When the Moon entirely blocks the Sun.






48. The distance between a lens and its focal plane






49. Venus






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