Castleman, Virginia

When their mother abandons them and their father ends up in jail again, ten-year-old Sara and her mentally troubled sister are thrust back into the foster care system.

When their mother abandons them and their father ends up in jail again, ten-year-old Sara and her mentally troubled sister are thrust back into the foster care system.

Describes the processes and effects of water, ice, and wind erosion, and includes experiments and a list of related Web sites.