Which type of plate boundary explain the eruption of Mt. St. Helens?
I think that a _____ boundary explains Mt. St. Helens because....
Model Version #2.
A few weeks ago, you drew your initial idea of why Mt. St. Helens erupted. Since then, we drew a model as a class, and learned about the layers of the earth and plate tectonics. Below, draw an updated model with at least 2 new details. Include the earth layers, tectonic plates, labels, and arrows to show what forces are at work. Describe your drawing in the box.
Check for understanding about plate tectonics - match the term with the description.
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Fossils and rock formations | arrow_right_alt | The theory that the earth's crust is broken into chunks that slowly move |
Convection currents | arrow_right_alt | A super continent that existed 250 million years ago |
Tectonic plates | arrow_right_alt | Circular movement of the mantle caused by heating and and cooling magma |
Pangaea | arrow_right_alt | Evidence Wegener used to come up with the theory of plate tectonics |
Plate tectonics | arrow_right_alt | Broken chunks of the crust that are in motion |
Check for understanding - match each description or example with the correct plate boundary.
Where an oceanic plates slides beneath a continental plate
When two plates are sliding apart
When two plates are colliding / crashing
Example: Himalayan Mountains, Cascade Mountains
Example: Hawaiian Islands
Example: San Andreas Fault
When two plates are sliding against each other in opposite directions
Where a suubduction zone occurs
Where new ocean floor is created
A magma plume rising to the surface in the middle of a plate
Convergent boundary
Divergent boundary
Transform boundary
Hot spot
Which idea from today would you like re-explained before we take our model assessment on Friday?