Test your basic knowledge |

Subject : science
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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 gap inthe outer portion of Saturn's A ring






2. Venus






3. The rotation period of the Earth measured relative to the Sun.






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






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






7. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.






8. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






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

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






11. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






12. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






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






14. A continuous spectrum of light missing energy at a few wave lengths.






15. 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






16. A term referring to Jupiter-like planets






17. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth






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






19. The Big Bang says that the universe has not existed forever. It had a distinct beginning about 14 billion years ago called the 'Big Bang'. Therefore light from any object more than 14 billion light years away has not had time to reach us. The other p

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






21. 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.






22. Venus (retrograde)






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






24. Clouds of low density gas often found glowing faintly on either side of an AGN.






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






26. 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






27. Hot cells of gas that rise and fall in the hotosphere






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






29. Venus






30. The apparent backward motion of a planet against the background of stars.






31. Possible Fates of the Universe






32. Young clusters in disk are irregularly shaped since they have no time to relax into the rounder relaxed shape of globular clusters-will constantly be torn apart and assimilated.






33. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)






34. Hydrogen and helium (mainly)






35. Venus






36. The mirror that gathers the light in a reflector






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






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






39. Ganymede and Titan






40. A star that is burning hydrogen to helium in a shell surrounding it's core






41. 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.






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






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






44. A small chunk of rock in space






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






46. The force of attraction between any two objects having mass






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






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






49. Is space infinitely large?

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







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