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. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)






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






3. 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.






4. A term referring to Earth-like planets






5. Mercury






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






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






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






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






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






11. 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.






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






13. A particle of light.






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






15. 100 nm 10 nm






16. The law stating that hotter blackbodies look bluer than cooler blackbodies.

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17. All possible types of energy that can be emitted and absorbed by atoms.






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






19. An entity that is likely in the nucleus of most - if not all - galaxies.






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






21. Matter so dense that even light cannot escape its gravity






22. 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






23. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:






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






25. IO






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






27. 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)






28. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core






29. A small and dim but hot star.






30. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.






31. Long - meandering cliff formed when a planet surface cools and shrinks






32. Neptune or uranus






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






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






35. The amount an image is enlarged by a telescope






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






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






38. A perfect absorber and radiator of electromagnetic radiation.






39. Dark areas on the sun that are cooler than the surrounding photosphere






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






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






42. 10 cm -> 1 mm






43. Any change in the speed or direction of an object's motion






44. A subatomic particle with a negative charge. It creates light.






45. Half of the longest diameter across an ellipse






46. Venus






47. 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






48. A crystalline patter found in iron meteorites






49. The process responsible for creating the arms of flocculent spiral galaxies






50. 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.