Is making peanut, pretzel and cereal mixture physical or chemical change

Drastic boundary changes can occur for all of the following reasons except for a. a shift in the way a river flows b. the collapse of a government system c. a conflict between two neighboring groups d. one country's decision to sell land to another country select the best answer from the choices provide

Which statements are accurate about snow flakes

Which theory suggested that the earth was once a signle supercontient that gradually that broke up into the contients that we know today