1. Erosion and weathering are major forces that shape the world around us. Understanding these forces helps us to understand the way our land is shaped – from rivers to lakes to canyons and our shore lines. For example the Grand Canyon was formed through erosion by the Colorado River running through it!
2. People play a part in the way and amount that our soil erodes around us. It is important for us to understand how erosion works and how effect on soil erosion since we depend on soil to grow our food and without it we would starve!
Cut a large apple into four equal parts. "Three parts represent the oceans of the world. The fourth part represents the land area of the world."
Cut the land section in half lengthwise. "One section represents land such as deserts, swamps, antarctic, arctic, and mountain regions. The other 1/8 represents land where man can live but may NOT grow food."
Slice this 1/8 section crosswise into four equal parts. "Three of these 1/32 sections represent the areas of the world which are too rocky, too wet, too hot, or where soils are too poor for food production, as well as areas developed by man."
Carefully peel the last 1/32 section. "This one small bit of peeling represents the soil of our earth on which mankind depends for food production."