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. 10^2 nm 10^7 nm






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






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






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






5. A star that blows itself apart






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






7. Mercury - Venus - Earth - Mars






8. The oldest terrain on the moon






9. A high-pressure bulge in Neptune's southern hemisphere






10. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.






11. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging






12. A faint - remarkably uniform distribution of radiation in space






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






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






15. The study of the universe as a whole.






16. A push or a pull






17. Any change in the speed or direction of an object's motion






18. The slow wobble of the Earth on its rotation axis.






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






20. 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






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

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22. The entity responsible for spiral arms in grand-design spiral galaxies






23. When the Moon entirely blocks the Sun.






24. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.






25. First accurately measured the speed of light in a vacuum






26. Ancient stream channels - flood planes - and sedimentary-type rock. Frozen water is found in the polar ice caps and in the soil.






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






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






29. The temp at which a substance in the vacuum of space solidifies






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

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31. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.






32. The shadow area behind the Earth or Moon where the Sun is completely obscured.






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






34. 1μm 100 nm






35. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)






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






37. The location of a supermassive black hole






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






39. The location of a supermassive black hole






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






41. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto






42. Light scattered through the atmosphere that degrades astronomical images






43. The mass of an object divided by its volume






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






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






46. Distribution of dust (tells us disk is thin) - find distances to O&B stars and H2 regions (arms are sights of star formation and OB stars live and die at location of birth) -Milky way has four arms. Sun is in spur apart from arms.






47. The apparent path of the Sun through the stars on the celestial sphere.






48. A spinning neutron star






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






50. Venus