1. Constructive Forces S5E1 Students will identify surface features of the Earth caused by constructive and destructive processes. a. Identify surface features caused by constructive processes. Depositions (sand dunes, deltas, etc) Earthquakes Volcanoes Faults Created for TCSS

2. Deposition  Weathering is when rocks and soil are worn down. Erosion is when the material that is worn down is carried away by wind, water, living beings or gravity. Deposition occurs when those materials stop moving and build up somewhere else. This is a constructive force.  Deltas and sand dunes are examples of deposition.  Click here to watch a video clip about river formation. here  Click here to watch a video clip about sand dunes. here

3. Earthquakes  Earthquakes can be both a constructive and destructive force. When the fault lines move they often cause incredible damage but they also can cause new land formations which is a constructive force.  Earthquakes can form mountains or lakes. Click here to watch: Animation of Earthquake and Tsunami in Sumatra (0:25)here

4. Volcanoes  Volcanoes can be a constructive force.  Volcanic islands are formed as magma erupts from the sea floor. As the tectonic plate moves, new islands are formed through the same hotspot.  As tectonic plates move apart, magma rises to the surface creating new land. Click here to watch: Volcanoes 101(3:04) here

5. Faults  The part where the plates touch is called a fault. Plates bump, scrape, and push against each other at the faults which causes earthquakes and volcanoes.  There are many different types of faults, which are created depending on how the tectonic plates collide.

6. Faults  Mountains form where the crust is crumpled and pushed upward by the movement of plates.  The Appalachian Mountains are mostly the result of faults folding and thrusting upwards.  The Ridge and Valley region and the Blue Ridge Mountains were built up by a series of faults that forced large sheets of rock to pile up. Click here to watch: San Andreas Fault (3:03) here