2. feldspar chemistry draw and explain the ternary phase diagram for feldspars (as shown in class). your explanation should make reference to exchange vectors, miscibility gaps, the rock types that might contain specific feldspars and, in turn, the formative plate tectonic environments. [30 pts] 3. magma viscosity 3a) calculate and plot the velocity profile through a 2 m-thick basaltic lava flow with a viscosity of 300 pa. s and density 275o kg mo descending a 2° slope. what is the shape of the profile? [20 pts] 3b) calculate the maximum velocity in the flow. do the same for a similar flow of rhyolite with a viscosity of 10° pa. s and density 2500 kg m*, and a lunar basalt from the sea of tranquility (moon, where g is 1.62 m s*) having a viscosity 9 pa. s and density 30oo kg m*. for comparison, calculate your own walking velocity (~4 miles/hour) in the same units. are these accurate estimates of lava flow rates? think of factors that might complicate the calculation. [3o pts]

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Rah is completing a school project on the expansion of fast food restaurants across the united states. she finds a map that shows a clear pattern of restaurants beginning in the east and expanding west. this map was most likely created using the technology of

Study guide for unit 2 ~ lesson 3 ,4, & 5 test, thursday, january 24th lesson 3 vocabulary erosion - deposition - landform- weathering- short answers 1. how do volcanic islands form? 2.why is deposition likely to occur outside a river bend? 3. in what conditions does soil form fastest? 4. which 2 earth’s systems interact to form a coral island? 5. a beach growing in size is most likely the result of 6. which type of islands are formed when a chunk of land breaks off from a larger landmass? long answers explain how plants can grow in small cracks of rock that do not appear to contain soil. lesson 4 vocabulary pollution - toxic - short answers 1. most farmers pollute soil by purposefully adding 2. what is the benefit of contour plowing? . 3. using nuclear power to produce electricity can cause water pollution by 4. why do scientists predict humans will run out of fossil fuels someday? 5.farmer spray crops with fertilizer and weed killer to the crops grow. how might this affect the hydrosphere? list two different ways you use fossil fuels. 1- 2- what are two other energy sources scientists and engineers are researching? 1- 2- lesson 5 vocabulary decompose- recycling - short answers 1. which of earth’s systems do you interact with when you wash your hands? 2. which of earth’s systems is polluted by exhaust gases from buses pollute? 3. why is it important to dispose of electronic devices properly? 4. where do people interact with all four of earth’s systems?