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






2. A large and bright but cool star.






3. Large nebula consisting of very cold gas and dust






4. A quantity measuring the stability of the Earth's atmosphere






5. The mirror that gathers the light in a reflector






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






7. Electromagnetic Radiation






8. Approximate speed of light in a vacuum






9. A small spherical dark nebula






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






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






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






13. The process that powers the sun and hydrogen bombs






14. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.






15. The equation that describes how matter equates with energy






16. When the Sun moves from south to north across the celestial equator (about March 21)






17. Jupiter






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






19. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.






20. VENUS






21. The distance light travels in one year (=9.46x10^12km).






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






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






24. Venus






25. A perfect absorber and radiator of electromagnetic radiation.






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






27. The study of the universe as a whole.






28. 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)






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






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






31. A measure of the force of gravity on an object






32. Venus






33. The rock that makes up the lunar maria






34. A force exerted by reflecting sunlight






35. Orbit in Jupiters orbit






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

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






38. The organization of clusters of galaxies into sheets and strings






39. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc






40. The high- temperatature outer layer of the sun






41. Rich= dense crowded cores of galaxies - poor= few members and a looser organization of galaxies






42. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core






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






44. When particles are compressed to an unnatural state where their pressure is not related to their temperature






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

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46. Why does the earth have few craters while the moon has many?






47. Matter that reveals itself only through its gravitational attraction






48. Centered on the Earth






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






50. The crust of a meteorite caused by its entry into Earth's atmosphere