"Cross Timbers is a proper term for areas where post oak and blackjack oak trees grow in close association over a large area, often with other species, and so close together that their crowns intermingle. The term is especially applicable where sandstone forms the underlying geology." (Francaviglia, Richard V. The Cast Iron Forest: a Natural and Cultural History of the North American Cross Timbers. University of Texas Press, 2000.)
Introduction - Fire in the Ozark Highlands
Students view an instructor-narrated slideshow about fire in the Cross Timbers ecosystem. During the slideshow, students complete an interactive lesson covering: 1) the distribution of the Cross Timbers; 2) the differences between savannas, woodlands, and forests; 3) biotic and abiotic factors associated with the Cross Timbers; and 4) learn the importance of fire disturbance in the Cross Timbers.Â
The Heat Plume of a Fire
Students learn about the three mechanisms that transfer heat energy away from a fire. These concepts are explored with an experiment that requires students to determine the size and shape of the heat plume associated with lit matches. This activity is part of the Oak Woodlands and Forests Fire Consortium's "Fire in the Cross Timbers" fire curriculum.
The Matchstick Woodland
The matchstick model of the cross timbers will be used to investigate how fire behavior in a wooded area can be influenced by fuel density/continuity, wind, and slope. This activity is part of the Oak Woodlands and Forests Fire Consortium's "Fire in the Cross Timbers" fire curriculum.