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. The science of measuring the apparent magnitudes of stars by imaging them through different filters.






2. The process of acquiring material






3. The lens that gathers the light in a refractor






4. The most mass a white dwarf can have before collapsing to a neutron star






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






6. Mercury






7. The source of the force that is accelerating the expansion rate of the universe.






8. A very dense - highly populated cluster of galaxies






9. A word meaning 'the same in all directions.'






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






11. The layer of the sun just above the photosphere






12. The wavelengths where a specific element can absorb or emit light.






13. Moon in less than the angular diameter of the Sun.






14. The science of measuring light energy by wavelength.






15. The elementary building blocks from which protons and neutrons are formed.






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






17. A small spherical dark nebula






18. How did Earth come to have an oxygen rich atmosphere?






19. 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.






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






21. Possible Fates of the Universe






22. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)






23. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.






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






25. An object that may remain after a star explodes






26. 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






27. A two-filter measure of the color - and hence temperature - of a star.






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






29. Loops that trace the magnetic field as it erupts from a sunspot area and arches over to an adjacent area. They glow in the light of gas pouring out of corona and falling into photosphere.






30. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.






31. The oldest grouping of stars - found in the galaxy halo






32. The distance a moon can be from a planet before shattering from tidal forces






33. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.






34. A high-pressure bulge in Neptune's southern hemisphere






35. 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)






36. Dark areas on the sun that are cooler than the surrounding photosphere






37. Electromagnetic Radiation






38. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.






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






40. The displacement of spectral lines to redder colors caused by the expansion of the universe.






41. Heavier elements such as iron - silicon - magnesium - sulfer - nickel






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






43. Any change in the speed or direction of an object's motion






44. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto






45. Electromagnetic Radiation






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






47. 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)






48. A toroidal or donut-shaped collection of material attracted to a central body like a star or black hole. Dust around an object






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






50. When the Sun is farthest north of the celestial equator (about June 22)