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. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.






2. A faint - remarkably uniform distribution of radiation in space






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






4. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)






5. The rate of expansion of the universe.






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






7. A small round distribution of gas surrounding a dying star






8. Jupiter






9. 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 _____.






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






11. A star fusing hydrogen to helium in it's core






12. Radiation (possibly left over from the big bang) that fills the universe. Perfect black body spectrum and tells us a bit aout how galaxies are formed.






13. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc






14. The process that powers the sun and hydrogen bombs






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






16. The mirror that determines the focus configuration of a reflector






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






18. A particle of light






19. 10 cm -> 1 mm






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






21. A large and bright but cool star.






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






23. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape






24. Is space infinitely large?

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






26. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)






27. What causes the zones and belts on jupiter and saturn?






28. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.






29. Electromagnetic Radiation






30. Venus (retrograde)






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






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






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






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






35. Jupiter






36. A bridge of material held in position above the solar surface. They can remain for hours even days






37. All wavelengths of light emitted by a blackbody.






38. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids






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






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






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






42. Sc galaxies






43. A galaxy sending out a stream of material from its nucleus






44. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)






45. A perfect absorber and radiator of electromagnetic radiation.






46. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation






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






48. A plot of star absolute magnitude verses spectral type.






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






50. First accurately measured the speed of light in a vacuum







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