Answers created by Mohammed S.

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• Question #178fa
  
• Question #178fa
  
• The movement of rock layers along what cause earthquakes?
  
• How does water move from groundwater reservoirs to surface water reservoirs?
  
• Question #42cd6
  
• How was the Cretaceous period different from the Jurassic Period?
  
• An earthquake happens near a city and levels many of the older buildings downtown. In a city 40 minutes away, the same earthquake only causes windows to rattle. What magnitudes will these cities report for the earthquake?
  
• How did the use of sonar change scientists' ideas about ocean-floor topography?
  
• Wegener thought that all of the present continents were once joined 245 million years ago in a landmass he called what?
  
• What is the easiest way to identify the mineral calcite?
  
• What type of rock is formed by volcanic activity?
  
• Question #794bf
  
• How was the Island of Japan formed?
  
• How does weathering, erosion and deposition contribute to the rock cycle?
  
• Why would the crystals in an intrusive igneous rock be larger than the crystals in a chemical sedimentary rock?
  
• Compared with other energy sources, only a small quantity of petroleum was used as fuel before the 1920s. What do you think petroleum's main uses might have been before that time?
  
• Why did geologists develop the geologic time scale?
  
• How do P-waves and S-waves differ?
  
• Question #aad0a
  
• Which type of fault has blocks of crust that move horizontally past each other?
  
• How do index fossils help determine age of rock layers?