What is the Rock Cycle? Like most Earth materials, rocks are created and destroyed in cycles. The rock cycle is a model that describes the formation, breakdown, and reformation of a rock as a result of sedimentary, igneous, and metamorphic processes. All rocks are made up of minerals. A mineral is defined as a naturally occurring, crystalline solid of definite chemical composition and a characteristic crystal structure.
It isn't illegal to chew gum, but it is illegal to bring them into Singapore or sell them except for medical purposes. Since you can't buy gum (selling is illegal) there's no way to chew them so it's almost as good as not being able to chew gum. http://www.customs.gov.sg/leftNa...
Chew Gum After Meals Similar to the idea of chewing food slowly, chewing gum after meals can help stimulate saliva production to enhance the digestive process. Also, having something to constantly chew in your mouth can help ward off excess food intake at buffets, and give your digestive system a break as it works to break down your already-eaten food.