Bellringer Plate Movements Bellringer Earthquakes Bellringer Plate Movements

Bellringer – Plate Movements

Bellringer - Earthquakes

Bellringer – Plate Movements

Bellringer – Sea-Floor Spreading Using this picture, describe sea-floor spreading.

Bellringer – Tectonic Plates What is the difference between a divergent and transform boundary?

Earth’s Movements **The large movable sections of the Earth’s crust are known as Tectonic Plates **The point where these plates touch/interact is known as a Plate Boundary Let’s look at the 3 types of plate boundaries a bit closer:

How do these plates and their movements shape our Earth?

Transform Boundary-- Boundary where plates slide past each other **A kind of Fault-- (a break in the Earth’s crust) Plates grinding builds pressure—rocks move or break Causes the ground to shake-- Earthquake Plates sliding past one another

Convergent Boundary- Two Plates collide here. Nonvolcanic mountain chains form when this happens.

3 Types of convergent boundaries 1. Boundary between 2 continental plates Forms mountains 2. Boundary between a continental plate and an oceanic plate 3. Boundary between 2 oceanic plates

One plate pushes under the other-Subduction Forms volcanoes An opening in the ground where melted rock, gases, and ash escape.

Divergent Boundary-- Two plates move away from each other Crack that forms between -Magma rises up forming new Happens on the ocean floor- Rift Crust (Land) Sea-floor Spreading On either side of rift volcanic mountains form a Midocean ridge Valley between -Rift Valley

Ring of Fire-- Zone of frequent earthquakes & volcanoes

New Madrid Fault Line – Tennessee / Reelfoot Lake

Ring of Fire occurs around the Pacific Ocean

Sometimes volcanic activity occurs……. Known as a Hot Spot Area of volcanic activity that is not near a plate boundary. Island chains form this way! What happens when the plates start moving across the top of the hot spot? Let’s watch the clip for the answer.

Use the following terms to complete the concept map below: tectonic plates, convergent boundary, transform boundary, divergent boundary, subduction zone, sea-floor spreading Tectonic plates Can be destroyed at a Convergent boundary which is often a Subduction zone are neither destroyed nor created at a Transform boundary can be created at a Divergent boundary which can be marked by Sea-floor spreading

A Earthquakes , Mountains, Volcanoes, Sea-Floor Spreading Quiz D B B