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 oldest part of the Milky Way






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






3. All wavelengths of light emitted by a blackbody.






4. 100 nm 10 nm






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






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






7. A streak of light in the atmosphere






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






9. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)






10. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this






11. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas






12. 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)






13. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.






14. 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)






15. A crystalline patter found in iron meteorites






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






17. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.






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






19. A force exerted by reflecting sunlight






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






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






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






23. When the Moon entirely blocks the Sun.






24. The process that powers the sun and hydrogen bombs






25. A location on an H-are Diagram where evolving stars pulsate






26. The rock that makes up the lunar maria






27. Where is the center of the expansion






28. A repeated - periodic push or pull capable of summing into a larger push or pull






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






30. The point directly overhead.






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






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






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






34. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)






35. Light-colored high-pressure bands in Jupiter's atmosphere






36. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies






37. Radiation (possibly left over from the big bang) that fills the universe. Perfect black body spectrum and tells us a bit aout how galaxies are formed.






38. The measure of a variable star's apparent magnitude as it brightens and dims with time






39. 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)






40. A spread of light with an uninterrupted wavelength distribution of energy.






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






42. Matter that reveals itself only through its gravitational attraction






43. A small spherical dark nebula






44. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






45. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites






46. What do we think the actual fate of the universe will be and why do we think this?






47. 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.






48. Venus






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






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