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 place in the sky that the Earth's axis points toward (can be either north or south)






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






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






4. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.






5. An energetic event taking place in the early universe






6. The act of removing an electron from an atom.






7. The 'edge' of the universe. Light beyond this has not reached us yet.






8. A word used in astronomy to describe all elements besides hydrogen and helium






9. The measure of a variable star's apparent magnitude as it brightens and dims with time






10. How is the Hubble Law consistent with an expanding universe?






11. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)






12. Half of the longest diameter across an ellipse






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






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






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






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






17. The universe is isotropic - homogeneous - and without beginning or end in time and space. If the universe is truly homogeneous then every line of sight will eventually end on a galaxy. If it has existed forever then there has been enough time for lig

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18. Small moons that maintain the shape of rings around Saturn and Uranus






19. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






20. Mercury and venus






21. The law that predicts the possible types of spectra.

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22. What is the universe expanding into?






23. Ganymede






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






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






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






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






28. 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.






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






30. 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.






31. A planet orbiting about a distant star






32. A repeated - periodic push or pull capable of summing into a larger push or pull






33. An empirical scheme for predictin ghe orbital distances of planets






34. The north-south line passing directly overhead through the zenith.






35. A star that erratically and explosively brightens and dims






36. Collections of young - hot stars






37. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.






38. The force of attraction between any two objects having mass






39. First accurately measured the speed of light in a vacuum






40. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the






41. The Greek philosopher responsible for making the stellar magnitude scale.






42. 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






43. The average distance between the Earth and the Sun (=1.5 x10^8km)






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






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






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






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






48. Light scattered through the atmosphere that degrades astronomical images






49. A streak of light in the atmosphere






50. The location around an atom where an electron resides.