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 lowest energy of an atom.






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






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






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






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






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






7. The imaginary sphere centered on the Earth that hols the stars.






8. The layer of the sun just above the photosphere






9. 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






10. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas






11. Sc galaxies






12. A streak of light in the atmosphere






13. The lowest energy of an atom.






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






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






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






17. A force exerted by reflecting sunlight






18. That which is responsible for Jupiter's magnetic field






19. 100 nm 10 nm






20. Mercury - Venus - Earth - Mars






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






22. A perfect absorber and radiator of electromagnetic radiation.






23. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:






24. Distance from sun to nucleus- 8 kiloparsecs (26000 LY) - diameter of Milky way- 150000 LY - length for sun to orbit once around milky way- 250 million years






25. The equation that describes how matter equates with energy






26. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE






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






28. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.






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






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






31. IO






32. Neptune or uranus






33. A quantity measuring the stability of the Earth's atmosphere






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






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






36. That which is responsible for Jupiter's magnetic field






37. 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






38. A distance measure determined by the shifting of a star against the background sky every 6 months.






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






40. A method of finding a star's distance from its absolute magnitude and spectral type or color.






41. The high- temperatature outer layer of the sun






42. 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.






43. A star that erratically and explosively brightens and dims






44. Elliptical orbits that come inside orbit of the Earth.






45. All wavelengths of light emitted by a blackbody.






46. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)






47. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)






48. An object that may remain after a star explodes






49. A crystalline patter found in iron meteorites






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