When are big earthquakes most likely?
a. when friction between rocks is variable
b. when friction between rocks is moderate
c. when friction between rocks is high
d. when friction between rocks is low

How does water pollution affect the environment

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

In the figure, polygon abcd is transformed to create polygon a′b′c′d′. this transformation is a by a factor of .