USING FLORIDA ENVIRONMENT IN TEACHING 27

Within that block of the chart, the identification number (1)
associates it with the concept, "The earth is worn away in some
places and built up in others." It is recognized that one para-
graph may serve equally well as an illustration for several con-
cepts. However, for the sake of simplicity only one concept is
keyed to each paragraph.

 (1) 2-III. Beach Erosion
 Beach erosion is an illustration of the fact that earth
 conditions change gradually. Beach erosion is caused
 in part by tides, currents and storms. There is a good
 example of beach erosion in Manatee County, where
 on Anna Maria Island the beach has noticeably changed,
 becoming narrower all the time. To the south about
 10 miles the beach is becoming larger. A survey has
 been carried on by the government, and information
 concerning beach erosion in Florida may be obtained
 by writing the Office of Geodetic Surveys, Washington,
 D.C.
 (2) 2-III. Soil Erosion and Leaching
 Soil erosion and leaching are examples of running
 water changing the land. The soils of the hilly sec-
 tions of central and western Florida counties are sub-
 ject to severe erosion losses. Soils of other sections
 suffer severe leaching losses. Such losses lead to re-
 duced yields per acre and poorer quality of product,
 and thus result in lowered incomes and levels of living
 for the people of the area. Much is being done each
 year in control measures, such as terracing, planting
 tree crops, planting and protecting cover crops, filling
 and repairing gullies, and seeding pasture areas. Some
 suggested activities for children are:
 1. Children look for signs of erosion in school area.
 Compare eroded area with a forest area.
 2. Examine soil in a productive field, noting color,
 depth of surface, amount of clay in subsoil, and
 hardpan, if any, in the soil.
 3. Examine pasture sod and forest area with a spade.
 Compare the conditions of soil to that of a culti-
 vated field. Which would be most likely to erode?
 4. Resod and recondition a small eroded area of the
 school ground or home yard.
 (3) 2-V. Florida Winter Season
 The basic reason for Florida being a winter tourist
 center lies in the fact that the state extends so far south