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 telescope configuration that has the focus placed at the back of the primary mirror






2. 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






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






4. When one side of a body always faces the planet it revolves around






5. 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 _____.






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






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






8. A word meaning 'the same everywhere throughout.'






9. 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)






10. The shadow behind the Earth or Moon where the Sun is partially obscured.






11. 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.






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






13. Earth






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






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






16. The particle horizon is the farthest we can see. It exists because the universe had a beginning and thus a definite age. Light from distances farther away from the particle horizon have not had time to reach us yet.






17. 1μm 100 nm






18. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder






19. The science of measuring light energy by wavelength.






20. The lens that gathers the light in a refractor






21. The high- temperatature outer layer of the sun






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






23. The movement of the Earth's crustal plates riding on top of the mantle.






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






25. The seasonal shifting of a nearby star's position relative to more distant objects.






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






27. 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






28. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.






29. The law that syas light energy from a blackbody increases as (temperature^4)






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






31. Dying large-mass stars lose their outer layers in a violent explosion creating large - chaotic remnants. these brighten like nova but are so much brighter and only occur ONCE PER STAR






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






33. Ganymede






34. 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.






35. Any class of objects with a uniform luminosity used to determine distance.






36. A large and bright but cool star.






37. A star that blows itself apart






38. Venus






39. Matter so dense that even light cannot escape its gravity






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






41. The rate of expansion of the universe.






42. 1μm 100 nm






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






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






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






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






47. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.






48. 10 cm -> 1 mm






49. Collections of young - hot stars






50. The point in its orbit where a planet is farthest from the sun