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






2. Radiation given off by electrons accelerating in a magnetic field






3. The universe is isotropic - homogeneous - and without beginning or end in time and space. If the universe is truly homogeneous then every line of sight will eventually end on a galaxy. If it has existed forever then there has been enough time for lig

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4. Mercury - Venus - Earth - Mars






5. A long-lived high-pressure bulge in Jupiter's southern hemisphere






6. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






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






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






9. Is there water on the moon?






10. The process similar to conduction by which energy moves from the solar core to the convective layer






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






12. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast






13. The amount an image is enlarged by a telescope






14. A huge sphere of tenuous gas surrounding the nucleus of a comet






15. A force exerted by reflecting sunlight






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






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






18. A particle of light






19. The powdered stone fragments that make up the lunar 'soil'






20. The rock that makes up the lunar highlands






21. A long-lived high-pressure bulge in Jupiter's southern hemisphere






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






23. Sc galaxies






24. The fusion process that turns three helium nuclei into a carbon nucleus






25. 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.






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






27. Population 1- similar to the sun and 2% of elements are metal - Population 2- formed before gas was metal- only a fraction of mass is metal.






28. 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






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






30. When massive objects bend space and time enough to create multiple images of an object located behind them






31. The mix of pure photon energy that emerged at the start of the universe.






32. 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.






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






34. The part of the Milky way that has on-going star formation






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






36. The lens that gathers the light in a refractor






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






38. What causes the zones and belts on jupiter and saturn?






39. 1μm 100 nm






40. Large nebula consisting of very cold gas and dust






41. The layer of the sun just above the photosphere






42. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.






43. A particle of light






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






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






46. Jupiter






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






48. Ganymede and Titan






49. Collections of young - hot stars






50. A small chunk of rock in space