Reinforcement. Teacher edition Glencoe/McGraw-Hill. 1. The theory of into sections. 2. These sections, called upper mantle. states that Eartha#39;s crust and upper mantle are broken , are composed of the crust and a part of the 3. The crust and upper mantle are called the ... motion at boundary Diagram 8. Type of boundary and motion at boundary Answer the following questions on the lines provided. 1. What.
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