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






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






3. The crust of a meteorite caused by its entry into Earth's atmosphere






4. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation






5. A planet orbiting about a distant star






6. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE






7. When particles are compressed to an unnatural state where their pressure is not related to their temperature






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






9. Then the Sun moves from north to south across the celestial equator (about September 23)






10. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






11. The seasonal shifting of a nearby star's position relative to more distant objects.






12. A small chunk of rock in space






13. Mercury






14. Ganymede






15. Approximate speed of light in a vacuum






16. Venus






17. Dying large-mass stars lose their outer layers in a violent explosion creating large - chaotic remnants. these brighten like nova but are so much brighter and only occur ONCE PER STAR






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






19. Europa






20. A planet that is farther from the sun than the Earth is






21. Any class of objects with a uniform luminosity used to determine distance.






22. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy






23. The movement of the Earth's crustal plates riding on top of the mantle.






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






25. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.






26. Half of the longest diameter across an ellipse






27. 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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28. Venus






29. 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.






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






31. Possible Fates of the Universe






32. Is space infinitely large?

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33. The rate of expansion of the universe.






34. The entity from which the whole universe is postulated to have come from.






35. A small and dim but hot star.






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






37. Venus






38. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.






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






40. A spectrum of light with energy at only a few wavelengths.






41. In what chemical form are jupiters nitrogen - carbon and oxygen?






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






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






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






45. The light produced when particles from the sun collide with atmospheric molecules






46. A star that blows itself apart






47. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.

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48. A collection of galaxies like the one the Milky Way belongs to






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






50. The rock that makes up the lunar maria