Post on 17-Jan-2016
PlateTectonics
The Earth’s outer layer or shellCrust
Made mostly of
oxygen and silicon
the layer of rock that surrounds the core
Mantle
Convection in the mantle cause the tectonic plates to move.
Cycles created by hot materials rising, cooling off, and then sinking back
down
Convection Currents
the innermost layer of Earth, made mostly of the elements iron and nickel
Core
The outer core is molten. The inner core is solid.
the outer zone of Earth, made of the crust and upper mantle /makes up the
tectonic plates
Lithosphere
The slowly flowing, semi-solid layer of rock under the lithosphere
Asthenosphere
Tectonic plates “float” on the semi-solid asthenosphere.
the strong, lower part of the mantleMesophere
The mantle is made up of 3 sub layers.
The idea that Earth’s
continents were once
connected and have broken
apart and drifted to their
present location
Theory of Continental Drift
German geologist, Alfred Wegener, was the first to describe continental drift.
the theory that the outer part of Earth is divided into several distinct
segments, called plates which move
Plate Tectonics
A border where tectonic plates move towards one another
Convergent Boundary
Converge means to come together.
A border where tectonic plates move apart from each other
Divergent Boundary
Diverge means to divide.
A border where tectonic plates slide past each other
Transform Boundary
FossilThe remains of traces of past life