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. Matter that reveals itself only through its gravitational attraction






2. A word meaning 'the same everywhere throughout.'






3. The temp at which a substance in the vacuum of space solidifies






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






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






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






7. The rotation of a star or planet at different speeds at its equator and poles






8. 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






9. 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






10. Possible Fates of the Universe






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






12. Titan






13. A planet orbiting about a distant star






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






15. The high- temperatature outer layer of the sun






16. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE






17. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.






18. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape






19. The area behind a lens where images are resolved






20. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.






21. A telescope that uses mirrors to focus light






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






23. When the Moon entirely blocks the Sun.






24. The gap etween saturn's A and B rings






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






26. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter






27. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.






28. Rich= dense crowded cores of galaxies - poor= few members and a looser organization of galaxies






29. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






30. The lowest energy of an atom.






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






32. The shadow area behind the Earth or Moon where the Sun is completely obscured.






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






34. A force exerted by reflecting sunlight






35. 10^2 nm 10^7 nm






36. The location of a supermassive black hole






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






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






39. Venus






40. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






41. 1 mm 1μm






42. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this






43. 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






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






45. Jupiter






46. Norhern lowlands- darker in color and have far fewer craters as if an ancient sea or ice field covered them. southern highlands- much higher in density of craters.






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






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






49. A measure of the force of gravity on an object






50. Hot cells of gas that rise and fall in the hotosphere