Sketch and describe how melting occurs along mid-ocean ridges and why the resulting magmas are basaltic (mafic). sketch and describe how magma is generated in a subduction zone. explain how the crystallization of minerals can change the composition of remaining magma. describe the main differences between felsic and mafic rocks

In e. c. tolman's experiment, some rats were trained to run through mazes for standard food goals, while other rats were allowed to explore the mazes for 10 days without food goals or other rewards. later, when food rewards were placed in a box at the far end of the maze, the previously unrewarded rats reached the food box as quickly as the rewarded rats after only one or two trials. this experiment demonstrated that the rats had the ability to form of their surroundings.