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 process responsible for creating the arms of flocculent spiral galaxies






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






3. A star that is in the process of forming. It glows from gravitational contraction






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






5. 10^2 nm 10^7 nm






6. A fusion process in which protons build together to form helium






7. Earth






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






9. A logarithmically scaled value for the measured brightness of a star.






10. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging






11. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.






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






13. A representation of the changes in color and brightness of an evolving protostar.






14. Jupiter






15. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast






16. A younger cluster of stars - found in the galaxy disk






17. Saturn






18. A small spherical dark nebula






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






20. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation






21. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy






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






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






24. 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






25. The lowest energy of an atom.






26. The entity responsible for spiral arms in grand-design spiral galaxies






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






28. The location of a supermassive black hole






29. The apparent path of the Sun through the stars on the celestial sphere.






30. 10 cm -> 1 mm






31. 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.






32. All wavelengths of light emitted by a blackbody.






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






34. The first rock-sized bodies that formed in the solar nebula from dust grains






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






36. The process that powers the sun and hydrogen bombs






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






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






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






40. Is space infinitely large?

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41. A perfect absorber and radiator of electromagnetic radiation.






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






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






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






45. A representation of the changes in color and brightness of an evolving protostar.






46. A telescope that uses mirrors to focus light






47. Radiation (possibly left over from the big bang) that fills the universe. Perfect black body spectrum and tells us a bit aout how galaxies are formed.






48. The law that syas light energy from a blackbody increases as (temperature^4)






49. Mercury






50. When the Sun moves from south to north across the celestial equator (about March 21)