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






2. The dark - relativley smooth areas on the moon; Latin for sea






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






4. When the Moon entirely blocks the Sun.






5. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)






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






7. The name for the only seriously considered theory of the universe.






8. Is space infinitely large?

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






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






11. The oldest part of the Milky Way






12. A subatomic particle with a negative charge. It creates light.






13. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)






14. A perfect absorber and radiator of electromagnetic radiation.






15. 10^2 nm 10^7 nm






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






17. Large nebula consisting of very cold gas and dust






18. The wavelengths where a specific element can absorb or emit light.






19. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






20. A very dense - highly populated cluster of galaxies






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






22. 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.






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






24. A logarithmically scaled value for the measured brightness of a star.






25. The material from which the solar system formed






26. Electromagnetic Radiation






27. Why do Galaxies move very rapidly in the interiors of the dense clusters?






28. An important quality of telescopes that increases as the square of the primary mirror or objective lens






29. The larger bodies that formed early in teh solar nebula that were chemically differentiated






30. The average distance between the Earth and the Sun (=1.5 x10^8km)






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






32. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.






33. 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.






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






35. The area behind a lens where images are resolved






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






37. The temp at which a substance in the vacuum of space solidifies






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






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






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






41. An important quality of telescopes that increases as the square of the primary mirror or objective lens






42. Collections of young - hot stars






43. 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.






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






45. The dimming of starlight by intervening dust






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






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






48. First accurately measured the speed of light in a vacuum






49. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth






50. Jupiter