Plates
What are tectonic plates?
a Big peace of earths Crust.
What are deep ocean trenches?
The deepest valleys on Earth's surface.
What is pangea
When earth was not a bunch of contents and it was one big super content.
What causes tectonic plates to move?
convection currents
type of boundary causing plates shift/spread apart from each other
divergent
When two big plates collide together what can happen?
Volcanos new land and earthquakes
What is the biggest deep ocean trench
The marina Trench.
What are fossils?
Traces or remains of organisms that once lived
The theory that continents are slowly moving over earth surface is called...
theory of continental drift
The ring of fire is a ring of volcanoes and earthquakes that occur along...
Plate boundaries in the Pacific ocean
How many plates are there?
13!
What is sea floor spreading?
How oceans form over millions of years.
Volcanos and earthquakes are formed from?
Tectonic plates
How do scientists know that plates are still moving?
FRom maps and sadlitits
What is 10 times 40???
400
The Earth's outer shell is divided into large pieces called?
Tectonic plates!
When Earth's crust is stretched out
True or false
volcanoes make lava first?
FALSE!!
Theory that states that pieces of earths crust are driven by movemeant in the mantle is called
the theory of tectonic plates
What is this lesson about?
Earths plates
What is it called when 2 plates slide past each other?
Transform Boundry.
What is a mid ocean ridge?
A giant continuous mountain range under water.
What does magma adventuly form?
Rocks
Volcanoes most like occur along which type of boundry...
convergent
What is the name for a crack in the Earth's crust where tectonic plates meet?
fault line