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. Moon in less than the angular diameter of the Sun.






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






3. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)






4. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






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






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






7. The mass of an object divided by its volume






8. 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.






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






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






11. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






12. A spectrum of light with energy at only a few wavelengths.






13. 10 cm -> 1 mm






14. The science of measuring light energy by wavelength.






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






16. Small moons that maintain the shape of rings around Saturn and Uranus






17. A star that is in the process of forming. It glows from gravitational contraction






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






19. A small chunk of rock in space






20. The rock that makes up the lunar highlands






21. Material that shoots rapidly out into space. Flares cause Auroras






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






23. The gap etween saturn's A and B rings






24. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use






25. The mass of an object divided by its volume






26. The Big Bang says that the universe has not existed forever. It had a distinct beginning about 14 billion years ago called the 'Big Bang'. Therefore light from any object more than 14 billion light years away has not had time to reach us. The other p

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






28. Hydrogen and helium (mainly)






29. 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)






30. Titan






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






32. The rotation of a star or planet at different speeds at its equator and poles






33. A planet that is closer to the sun than the earth






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






35. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth






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






37. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.






38. 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)






39. The lens that gathers the light in a refractor






40. A planet orbiting about a distant star






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






42. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this






43. 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)






44. A very dense - highly populated cluster of galaxies






45. A star that blows itself apart






46. A change in the wavelength of light caused by a motion between the observer and light (or wave) source (blue shift if getting closer - red shift if moving away)






47. The apparent backward motion of a planet against the background of stars.






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






49. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.






50. The point in its orbit where a planet is nearest the sun