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. Comglomerates of ice and rock that orbit the sun in highly elliptical paths






2. Mercury






3. Venus






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






6. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes






7. A prominence seen against the disk of the sun






8. A push or a pull






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






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






11. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






12. A star without enough mass to begin hydrogen fusion






13. 10 cm -> 1 mm






14. 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.






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






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






17. 10 nm 10^2 nm






18. A galaxy sending out a stream of material from its nucleus






19. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)






20. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.






21. A small and dim but hot star.






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






23. Mercury






24. The study of the universe as a whole.






25. 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)






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






27. Ganymede






28. The light produced when particles from the sun collide with atmospheric molecules






29. The cosmological principle is the assumption that the universe is isotropic and homogeneous.The Big Bang assumes it to be a correct principle so that what we observe is exactly like What is too far away to be observed.






30. An energetic event taking place in the early universe






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






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






33. The relation that tells how light dims with distance.






34. The equation that describes how matter equates with energy






35. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t






36. The final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.






37. A force exerted by reflecting sunlight






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






39. Mercury and venus






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






41. Very center of galaxy. suggestion of a black hole






42. Hydrogen and helium (mainly)






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






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






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






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






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






48. The oldest terrain on the moon






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






50. IO