magma or lava cooling
How do igneous rocks form?
Limestone can change to marble due to intense heat and pressure.
What is metamorphic?
Causes the plates to move...

Convection currents in the mantle
The Himalayan Mountains form at this kind of boundary.
Convergent
A process that breaks down Earth's crust such as weathering and erosion.
Destructive
heat and pressure
How do metamorphic rocks form?
Shale forms when sediments like clay are compacted over many years.
What is sedimentary?
The reason why the same fossils and rocks are found on different continents.

They were once connected.
The Mid-Atlantic Ridge is splitting apart...
Divergent
A process that builds Earth's crust such as mountains at convergent boundaries
constructive
Weathering and erosion of rocks
How do sediments form?
A volcano erupts and the lava forms obsidian.
What is igneous?
Two things that happen at a mid-ocean ridge.
The plates split apart, magma rises, lava forms new crust.
The San Andreas fault is moving one side of California North and one side South.

Transform
How did this form? Was it constructive or destructive?

Erosion, destructive
Sediments are compacted and cemented together in layers.
How do sedimentary rocks form?
A rock that has large crystals and cooled underground.
What is intrusive igneous?
Name two natural disasters that happen on the edges of the plates at the plate boundaries.

Earthquakes and Volcanoes
This happens when oceanic crust collides with continental OR oceanic crust...
Subduction Trench
When a river slows down it drops off sediments. What is this called & is it constructive or destructive?

Deposition, Constructive
Rocks being broken into smaller pieces due to acid in rain...
Chemical Weathering
A rock that has crystals and layers indicating how the rock was smashed.
What is metamorphic?
Name three of Earth's layers from hottest to coldest...
Core, Mantle, Crust
______ - two plates collide.
______ - two plates divide.
Convergent & Divergent
This process can build islands very quickly. What is it and is it constructive or destructive?
Volcano, Constructive