1. Shaping our Earth PowerPoint 2
1/30/2017

2. How is Earth’s Crust like lily pads on a pond?
Earth’s crust is made up of mobile plates, floating on a sea of mantle. The continents used to be one land mass, but it broke up and moved over millions of years to our continents today

3. plate tectonics video (watch 0-5:30)
Know the boundaries (convergent, divergent, transverse)

4. Plate Tectonics
Earth’s crust is broken into plates that are floating on the mantle
These plates move slowly and bump into each other, causing change
Pangea Earth Today

5. Erosion and Weathering
Water Erosion 1:40-end
The wearing away of the crust of the earth by wind and water

6. deforestation Deforestation
Trees help keep the soil together and stop erosion
For various reasons, we cut them down
When we chop down our forests too much, we increase erosion and weathering

7. More effects of erosion
landslide 0-3

8. Erosion experiment
Can you decrease the speed of erosion in your erosion tub using only toothpicks?