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






2. When the Moon entirely blocks the Sun.






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






4. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu






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






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






7. Orbit in Jupiters orbit






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. A small chunk of rock in space






10. An evolved star - past the helium flash that is burning helium to carbon in it's cores






11. 10 cm -> 1 mm






12. The projection of the Earth's equator onto the celestial sphere.






13. Wave- only waves cause an interference pattern when passing through a double slit - particle- only particles deposit energy at specific locations (the way an image builds up on digital camera)






14. A phenomenon seen when the Earth passes through the orbit of a burned out comet






15. Neptune or uranus






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






17. Poitns of gravitational stability in the orbit of a planet






18. The material from which the solar system formed






19. 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.






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






21. The rock that makes up the lunar highlands






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






23. Form honeycomb like patterns surrounding empty or nearly empty voids.






24. Heavier elements such as iron - silicon - magnesium - sulfer - nickel






25. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.






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






27. A force exerted by reflecting sunlight






28. A representation of the changes in color and brightness of an evolving protostar.






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






30. Why does the earth have few craters while the moon has many?






31. Centered on the sun.






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






33. The law stating that hotter blackbodies look bluer than cooler blackbodies.

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34. The law that predicts the possible types of spectra.

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






36. An entity that is likely in the nucleus of most - if not all - galaxies.






37. Moon in less than the angular diameter of the Sun.






38. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.






39. The distance a moon can be from a planet before shattering from tidal forces






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






41. 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






42. The oldest grouping of stars - found in the galaxy halo






43. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)






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






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






46. 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.






47. 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






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






49. The normal eastward movement of a planet against the background of hte distant stars.






50. A quantity measuring the stability of the Earth's atmosphere







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