What are huge under-water mountain ocean ridges called?
100
it is formed where the South American plate and Nazca plate meet.
Where is the Andes mountain located?
100
Pangaea.
What is the colliding of the continents called?
100
divergent boundaries, convergent boundaries, and transform boundaries.
What are the three types of boundaries?
100
a block of lithosphere that consists of the crust and the rigid, outermost part of the mantle.
What are tectonic pates?
200
the youngest rock is closer to the ridge and the oldest rock is far away.
Where are the youngest rock and oldest rock are to the ridges?
200
it was 245 million years ago.
when was Pangaea still together?
200
Mountains were formed.
What happened when the continents called?
200
the form is convergent boundaries.
What is the boundary when two plates collide?
200
the movement of matter due to differences in density that are caused by temperature variations; can result in the transfer of energy as heat.
What is convection?
300
molten rock rises through the cracks of the ridge, cools, and forms new oceanic crust.
What is the sea floor spreading?
300
200 million years ago
When did Pangaea begin to break up
300
Laurasia and Gondwana.
What were the two continents that began to break called?
300
the boundary is divergent boundary.
What is the boundary where two plates move away from each other?
300
the process by which new oceanic lithosphere sea floor forms when magma rises to Earth's surface at mid-ocean ridges and solidifies as older, existing sea floor moves away from the ridge.
What is sea-floor spreading?
400
magnetic patterns.
What does sea floor rock contain?
400
North America, Eurasia, Africa, India, South America, Australia, Antarctica.
What was formed 65 million years ago?
400
North America and Eurasia.
What continents formed when laurasia split?
400
it is transform boundary
What is the boundary where two plates move horizontally past?
400
the super continent that formed 300 million years ago and that began to break up 200 million years ago
What is pangea
500
dense oceanic crust is sinking into the atmosphere of huge trenches.
Why is Earth not getting larger
500
50 million years ago.
when did the Himalayan mountains begin to form?
500
it formed the South Atlantic ocean.
What happened when Africa and South Africa opened?
500
it is San Andres Fault in California
What is the major place for transform boundaries?
500
the theory that explains how large pieces of the lithosphere, called plates, move and change shape