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 trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






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






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






4. The oldest part of the Milky Way






5. Orbit in Jupiters orbit






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






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






8. Norhern lowlands- darker in color and have far fewer craters as if an ancient sea or ice field covered them. southern highlands- much higher in density of craters.






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

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






11. What are the three possible geometries of the universe?






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






13. That which is responsible for Jupiter's magnetic field






14. 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.






15. Europa






16. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.






17. When a planet lines up with the sun inthe sky






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






19. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.






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






21. The law that describes the blackbody curve - and let to quantum mechanics.

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






23. Light scattered through the atmosphere that degrades astronomical images






24. Mercury






25. The Greek philosopher responsible for making the stellar magnitude scale.






26. A toroidal or donut-shaped collection of material attracted to a central body like a star or black hole. Dust around an object






27. Jupiter - Saturn - Uranus - Neptune






28. The first rock-sized bodies that formed in the solar nebula from dust grains






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






30. The area behind a lens where images are resolved






31. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)






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 very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.






34. A point in the sky where meteors appear to come from during a shower






35. 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)






36. Venus






37. A long-lived high-pressure bulge in Jupiter's southern hemisphere






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






39. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)






40. The dimming of starlight by intervening dust






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






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






43. The elementary building blocks from which protons and neutrons are formed.






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






45. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






46. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere






47. The elementary building blocks from which protons and neutrons are formed.






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






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






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