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. When a planet lines up with the sun inthe sky






2. 10 nm 10^2 nm






3. The apparent backward motion of a planet against the background of stars.






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






5. Earth






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






7. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)






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 the Moon entirely blocks the Sun.






11. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter






12. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)






13. The science of measuring light energy by wavelength.






14. 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.






15. 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)






16. Jupiter






17. Sc galaxies






18. The rotation of a star or planet at different speeds at its equator and poles






19. Orbit in Jupiters orbit






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






21. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.

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22. The normal eastward movement of a planet against the background of hte distant stars.






23. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction






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






25. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






26. When massive objects bend space and time enough to create multiple images of an object located behind them






27. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






28. 1. We see rapid movements or high energy radiation coming at some level from the nuclei of nearly every galaxy we have looked at. 2. We suspect that the creation of these supermassive black holes is part of the galaxy formation process.






29. The process similar to conduction by which energy moves from the solar core to the convective layer






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






31. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.






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






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






34. The surface of the sun






35. The rate of expansion of the universe.






36. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter






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






38. Clouds of low density gas often found glowing faintly on either side of an AGN.






39. What Ole Roemer used to measure the speed of light in a vacuum






40. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






41. What is the universe expanding into?






42. Electromagnetic Radiation






43. The location in the Milky Way where stars orbit like a solid wheel






44. The location of a supermassive black hole






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






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






47. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






48. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies






49. The process responsible for creating the arms of flocculent spiral galaxies






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