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. First accurately measured the speed of light in a vacuum






2. 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.






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






4. The larger bodies that formed early in teh solar nebula that were chemically differentiated






5. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density






6. An element of a highly efficient - two-dimensional electronic light detector






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






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






9. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.






10. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.






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






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






13. 100 nm 10 nm






14. When massive objects bend space and time enough to create multiple images of an object located behind them






15. 1μm 100 nm






16. The science of measuring light energy by wavelength.






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






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






19. The layer of the sun just above the photosphere






20. A rock or iron specimen that has fallen from space






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






22. 1 mm 1μm






23. Venus






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






25. 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.






26. 10 nm 10^2 nm






27. The process similar to conduction by which energy moves from the solar core to the convective layer






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






29. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas






30. A word meaning 'the same everywhere throughout.'






31. Ganymede






32. An empirical scheme for predictin ghe orbital distances of planets






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






34. The place in the sky that the Earth's axis points toward (can be either north or south)






35. Mercury - Venus - Earth - Mars






36. Sc galaxies






37. 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.






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






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






40. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.






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






42. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)






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






44. A push or a pull






45. A term referring to Jupiter-like planets






46. Heavier elements such as iron - silicon - magnesium - sulfer - nickel






47. When the Sun moves from south to north across the celestial equator (about March 21)






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






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






50. 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.