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 layer of the sun just above the photosphere






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






3. A change in the appearance of the sun at the edge of the solar disk






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






5. Neptune or uranus






6. The high- temperatature outer layer of the sun






7. A small spherical dark nebula






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






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






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






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






12. A star that blows itself apart






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






14. Light scattered through the atmosphere that degrades astronomical images






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






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






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






18. A term referring to Earth-like planets






19. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.






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






21. The era when the ratio of matter to energy greatly favored matter. (verses radiation dominated universe where it was opaque. Matter is now dominated by gravity not photons)






22. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density






23. Population 1- similar to the sun and 2% of elements are metal - Population 2- formed before gas was metal- only a fraction of mass is metal.






24. Material that shoots rapidly out into space. Flares cause Auroras






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






26. The lens in a telescope used to determine the magnification






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






28. A spectrum of light with energy at only a few wavelengths.






29. An element of a highly efficient - two-dimensional electronic light detector






30. A streak of light in the atmosphere






31. 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.






32. Venus (retrograde)






33. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object






34. The process that powers the sun and hydrogen bombs






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






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






37. The mass of an object divided by its volume






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






39. Infinitely long -> 10 cm






40. 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






41. 1μm 100 nm






42. A bright area of higher temperature that often proceeds the formation of sunspots.






43. When one side of a body always faces the planet it revolves around






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






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






46. Venus






47. The shadow behind the Earth or Moon where the Sun is partially obscured.






48. The seasonal shifting of a nearby star's position relative to more distant objects.






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






50. The location of a supermassive black hole