12. What is the name given to weathering that occurs as a result of repeated freezing and thawing of water? Double your points if you can tell me the type of weathering this is.
14. What do we call weathering that occurs as a result of oxygen reacting with water and iron? Double your points if you can tell me the type (mechanical or chemical) of weathering.
18. What is the type of weathering that occurs as a result of repeated heating and cooling? Double your points if you can tell me the type of weathering.