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 fate of the universe if it is closed. The universe expanding as much as possible and then retracting






2. The lens that gathers the light in a refractor






3. The north-south line passing directly overhead through the zenith.






4. The oldest terrain on the moon






5. 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)






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






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






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






9. A fusion process in which protons build together to form helium






10. Centered on the sun.






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






12. The Greek philosopher responsible for making the stellar magnitude scale.






13. The apparent path of the Sun through the stars on the celestial sphere.






14. The study of the universe as a whole.






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






16. The oldest part of the Milky Way






17. A massive variable star used to find distances to the galaxies or clusters that contain them.






18. The lowest energy of an atom.






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






20. Jupiter






21. The mass of an object divided by its volume






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






23. 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






24. The relation that tells how light dims with distance.






25. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas






26. A small chunk of rock in space






27. The surface of the sun






28. The sinking of denser elements to the center of a young molten planet






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






30. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.






31. The imaginary sphere centered on the Earth that hols the stars.






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






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






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






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






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






37. A bright area of higher temperature that often proceeds the formation of sunspots.






38. What is the universe expanding into?






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






40. Small moons that maintain the shape of rings around Saturn and Uranus






41. A change in the wavelength of light caused by a motion between the observer and light (or wave) source (blue shift if getting closer - red shift if moving away)






42. A small spherical dark nebula






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






44. Venus






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






46. 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






47. Ganymede






48. The cosmological principle is the assumption that the universe is isotropic and homogeneous.The Big Bang assumes it to be a correct principle so that what we observe is exactly like What is too far away to be observed.






49. A particle of light






50. The equation that describes how matter equates with energy