Name GEOL 1120 Worksheet Review for Quiz 1 1 a Draw the general shape of the population pyramid of a country that is in stage 2 of the demographic transition Annotate the population pyramid to explain what its shape tells you about the population distribution of the country b List and briefly describe three changes that could potentially occur in this stage 2 country that would affect its growth rate and move it into later stages of the demographic transition 2 a In the table below list the layers of the Earth based on chemical composition For each layer write a brief description 2 sentences max about what distinguishes that layer from others Name of Layer Brief Description Layers Based on Chemical Composition 1 Name b Create a list of the layers of the Earth based on physical properties For the two layers we learned about in class write a brief description 2 sentences max about what distinguishes that layer from others Name of Layer Brief Description Layers Based on Physical Properties Not covered in class you can leave this blank Not covered in class you can leave this blank Not covered in class you can leave this blank c Draw a cross section vertical slice through something perpendicular to a bird s eye view of the Earth showing its layers Include both the layers based on chemical composition and those based on physical properties The scale of your drawing does not need to be accurate but it should be reasonable there are some layers that are way thicker thinner than others 2 Name following features 3 Draw a simple cross section of each of the following plate boundaries Label each with the Label all oceanic and or continental plates Draw arrows to indicate the direction of plate movement If applicable label where a mafic igneous rock would form If applicable label where a felsic igneous rock would form If applicable label where a contact metamorphic rock would form If applicable label where a regional metamorphic rock would form Divergent Boundary Transform Boundary Oceanic oceanic convergent boundary Continent continent convergent boundary 3 Name 4 Explain why and how geologists divide minerals into different mineral classes List the most important mineral classes that host metals and explain what defines each class 5 You are given an intrusive igneous rock and an extrusive igneous rock Describe what visible physical characteristics you could use to distinguish between the two of them 6 You are given a contact metamorphic rock and a regional metamorphic rock Describe what visible physical characteristics you could use to distinguish between the two of them 4 Name 7 Briefly describe the process that form clastic sedimentary rocks Your answer should not just be a list of geology jargon but an explanation of what those terms mean 8 There are seven criteria that determine whether a mineral deposit is an ore deposit In the table below list each criterion and briefly describe how it influences whether the accumulation of minerals is an ore deposit Criterion Brief Description 5 Name 9 a The table below shows the average concentration of various metals in the Earth s crust and the percentage of those metals required in a rock i e grade of ore to make it an ore deposit What is the concentration factor of platinum Note These numbers are made up so that the concentration factor can be calculated without a calculator like you d have to do on a quiz Metal Average concentration in Earth s crust Required percentage of metal in rock Platinum Pt Gold Au Silver Ag 1 0 5 10 grade to be an ore 5 10 20 b Is the concentration factor of silver higher or lower than that of platinum What does this say about the rarity of silver compared to platinum 6 Name 10 Draw a diagram depicting how each of the three ore forming processes we learned about occurs Label each diagram to explain the process that is occurring to concentrate the ore a Magmatic indicate if your diagram depicts just fractional crystallization or fractional crystallization gravity settling b Hydrothermal c Surficial 7 Name 8