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






2. Centered on the Earth






3. A word meaning 'the same in all directions.'






4. A prominence seen against the disk of the sun






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






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






7. A force exerted by reflecting sunlight






8. A force exerted by reflecting sunlight






9. 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.






10. The location in an H-are diagram of a star cluster - where stars have just left the main sequence. Used to estimate the cluster age.






11. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes






12. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie

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






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






15. A term referring to the orbital character of stars near the Sun






16. Jupiter






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






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






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






20. The amount an image is enlarged by a telescope






21. A planet that is closer to the sun than the earth






22. 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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23. Light scattered through the atmosphere that degrades astronomical images






24. The oldest terrain on the moon






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






26. A faint - remarkably uniform distribution of radiation in space






27. A spread of light with an uninterrupted wavelength distribution of energy.






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






29. 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.






30. 1μm 100 nm






31. The apparent magnitude a star would have if it were at a distance of 10 parsecs.






32. The source of the force that is accelerating the expansion rate of the universe.






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






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






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






36. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)






37. 10 nm 10^2 nm






38. The location of a supermassive black hole






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






40. A star that blows itself apart






41. Venus (retrograde)






42. The displacement of spectral lines to redder colors caused by the expansion of the universe.






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






44. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.






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






46. When a planet lines up with the sun inthe sky






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






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






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






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