We are wrapping up our lessons on topographic and aerial maps and will have a quiz on it Wednesday. Students received a small review sheet on Monday to help them study. We discussed the difference between aerial and topographic maps, and last week students drew a topographic map of the Grand Canyon and Mt. Shasta. Students have also had the opportunity to interpret topographic maps, including their elevations. We looked at google images to see aerial maps and students interpreted an aerial photograph of Mt. Shasta.
Our next lessons are extremely important and will examine the impact that weathering, erosion, and deposition have on creating landforms. We will pretend to be water in rivers and the ocean and will beat rocks together to show weathering, carry sediment to show erosion, and deposit sediment in a pan (the delta) to show deposition. We will play the game Simon Says so students get ample practice with these processes, and participate in a sorting activity to determine the difference between weathering and erosion. I will show them real life examples of weathering and erosion from Chimney Rock, and from the Pacific West coast (ocean erosion and weathering). Finally, all students will participate in an erosion student inquiry to see which situation promotes the most erosion and which promotes the least. We will put soil outside the ramp by itself, cover the same soil with straw to represent crop residue, plant vegetation, put pine forest needles on it, put a steep slope on the soil, and finally put a hill. We will examine each over a week to determine which had the most erosion and why. This will lead to a discuss about why we should not build on steep slopes, why we should plant vegetation, what farmers can do to prevent soil erosion after harvesting crops, and how to prevent erosion in general.
Homework for the week:
Monday night: study for the Topographic and aerial map quiz on Wednesday
Tuesday: study for the Topographic and aerial map quiz on Wednesday; write one example of weathering, one example of erosion, and one example of deposition
Wednesday: Weathering and Erosion Questions (Worksheet 1)
Thursday: Weathering and Erosion Questions (Worksheet 2)
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