Metamorphism is the solid-state change of a rock in response to a modification to its environment. From the list below, select four environmental changes that are most responsible for causing metamorphism. Correct Answer(s) increase in temperature Press Space to open application of stress Press Space to open physical erosion Press Space to open exposure to hydrothermal fluids Press Space to open increase in pressure Press Space to open change in groundwater pH Press Space to open Incorrect Answer(s)

increase in temperature  

exposure to hydrothermal fluids  

increase in pressure

physical erosion  

Explanation:

Metamorphism is the geological process that allows the formation of metamorphic rocks through the modification of these rocks promoted by the modifications in their environments. Metamorphism can be primary or secondary, however, this process occurs when the environment causes the rocks to be subjected to strong impacts, changes in temperature, pressure, contact with hydrothermal fluids and through time and climate.