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 high- temperatature outer layer of the sun






2. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the






3. 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)






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 push or a pull






6. 10 nm 10^2 nm






7. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.






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






9. 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






10. Mercury






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






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






13. A two-filter measure of the color - and hence temperature - of a star.






14. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas






15. A younger cluster of stars - found in the galaxy disk






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






17. A logarithmically scaled value for the measured brightness of a star.






18. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy






19. A massive variable star used to find distances to the galaxies or clusters that contain them.






20. Is there water on the moon?






21. The distance light travels in one year (=9.46x10^12km).






22. When the Sun is farthest south of the celestial equator (About December 22)






23. 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)






24. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






25. When the Sun is farthest south of the celestial equator (About December 22)






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






27. Possible Fates of the Universe






28. A huge sphere of tenuous gas surrounding the nucleus of a comet






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






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






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






32. Mercury and venus






33. Mercury






34. Centered on the Earth






35. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






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






37. The gap inthe outer portion of Saturn's A ring






38. The apparent magnitude a star would have if it were at a distance of 10 parsecs.






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






40. Hydrogen and helium (mainly)






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






42. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object






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






44. Ganymede and Titan






45. Is space infinitely large?

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46. The name for the only seriously considered theory of the universe.






47. The oldest part of the Milky Way






48. 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)






49. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






50. Mercury - Venus - Earth - Mars






Can you answer 50 questions in 15 minutes?



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