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 study of the universe as a whole.






2. The dimming of starlight by intervening dust






3. When the Sun is farthest north of the celestial equator (about June 22)






4. The rate of expansion of the universe.






5. Matter that reveals itself only through its gravitational attraction






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






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






8. 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.






9. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula






10. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use






11. 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.






12. A measure of the ability of a telescope to see fine detail






13. 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.






14. Light scattered through the atmosphere that degrades astronomical images






15. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids






16. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter






17. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes






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






19. 10^2 nm 10^7 nm






20. The family of radiant energy that includes light as a subset






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






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






23. A galaxy emitting large amounts of energy at long wavelengths.






24. A telescope that uses lenses to focus light






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






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






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






28. The mass of an object divided by its volume






29. 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






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






31. A distance measure determined by the shifting of a star against the background sky every 6 months.






32. 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






33. A crystalline patter found in iron meteorites






34. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






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






36. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.






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






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






39. Large nebula consisting of very cold gas and dust






40. Matter that reveals itself only through its gravitational attraction






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






42. Dark areas on the sun that are cooler than the surrounding photosphere






43. Jupiter






44. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie

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45. A plot of star absolute magnitude verses spectral type.






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






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






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






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






50. A small round distribution of gas surrounding a dying star







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


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