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. A star that is in the process of forming. It glows from gravitational contraction






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






3. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE






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






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






6. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t






7. 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






8. The family of radiant energy that includes light as a subset






9. The rock that makes up the lunar maria






10. 100 nm 10 nm






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






12. Approximate speed of light in a vacuum






13. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.






14. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker






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






16. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.






17. Comglomerates of ice and rock that orbit the sun in highly elliptical paths






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






19. Possible Fates of the Universe






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






21. 10 cm -> 1 mm






22. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.






23. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.






24. Where is the center of the expansion






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






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






27. Titan






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






29. The equation that describes how matter equates with energy






30. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)






31. The distance a moon can be from a planet before shattering from tidal forces






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






33. Is space infinitely large?

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34. A bridge of material held in position above the solar surface. They can remain for hours even days






35. Is space infinitely large?

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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. The point directly overhead.






38. Any change in the speed or direction of an object's motion






39. The mirror that determines the focus configuration of a reflector






40. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy






41. A continuous spectrum of light missing energy at a few wave lengths.






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






43. A telescope that uses lenses to focus light






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






45. Then the Sun moves from north to south across the celestial equator (about September 23)






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






47. Jupiter






48. In what chemical form are jupiters nitrogen - carbon and oxygen?






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






50. A perfect absorber and radiator of electromagnetic radiation.