Vocabulary
Earth’s outermost layer of hard, solid rock that is underneath the soil, vegetation, and water.
What is the outer layer or crust?
Earth's outer layer is divided into sections called ____________.
What are plates?
Two plates move away from each other.
What is divergent?
How do scientists track plate motion?
GPS
Could the Mesosaurus swim far distances?
No
This type of plate movement happens when 2 plates slide past each other in opposite directions.
What is a transform boundary?
The plates of Earth's outer layer __________________.
What is move?
Two plates move toward each other.
What is convergent?
True or False- Some continents are no longer moving.
False-
Continents are always moving slowly due to movement in the mantle.
If two rocks were in the same place 300 million years ago but are not 24 kms apart-- what kind of plate boundary are they on?
Divergent
An underwater mountain range formed when two plates move apart.
What is a mid-ocean ridge?
Earth's plates move on top of a soft, solid layer called the __________________.
What is the mantle?
The type of boundary that lies between South America and Africa.
What is divergent boundary?
When plate converge, what is one of the plates being absorbed into?
The mantle
What is a cross section?
If you cut in the middle of something and saw the layers of it
A long, deep indentation in the ocean floor formed when two plates move together
What is a trench?
This process occurs when 2 plates collide and one plate slides under the other and into the mantle.
What is subduction?
What landforms are found near plate boundaries?
Mid-ocean ridge, trench, and volcano.
True or False- Continents slowly move apart as new crust is formed over millions of years.
True-
The soft, solid mantle fills the space.
This is the name of the scientist that proposed the Continental Drift Theory.
Who is Alfred Wegener?
An extinct reptile that lived about 300 million years ago.
What is Mesosaurus?
At divergent plate boundaries, rock rises from the mantle and _______, adding new solid rock to the edges of both plates.
What is cools and solidifies?
How fast do plates move per year? What is the rate?
About 3 cm per year
What is Earth's outer layer like underwater?
Hard solid rock
What is a pattern?
Something that repeats over time