The plastic like layer of Earth's surface below the lithosphere.
asthenosphere
The cycle of heating, rising, cooling, and sinking fluids.
convection currents
The theory that states that Earth's crust and upper mantle are broken into sections, which move around on a special layer of the mantle.
plate tectonics
The rigid layer of Earth's surface made up of the crust and a part of the upper mantle, upon which tectonic plates move.
lithosphere
The hypothesized giant landmass or "supercontinent" thought to have broken apart about 200 million years ago into separate continents.
Pangaea
The hypothesis that continents have moved slowly to their current locations.
continental drift
The sections that make up the Earth's crust and upper mantle.
plates
The largest layer of Earth's interior, composed mostly of silicon, oxygen, magnesium, and iron.
mantle
The outermost (shell like) layer of Earth's surface.
crust
One of the seven (or six) land masses on the planet.
continent
The portion of Earth's crust that lies beneath the ocean.
seafloor
Hess's theory that new seafloor is formed when magma is forced up to the surface at mid-ocean ridges and spreads out.
seafloor spreading
The force that created the movement of plates and led to the plate tectonic theory was
convection currents
The colliding, pulling apart, or sliding against each other of the Earth's plates, causes.
movement
To come together or collide
converge
To move apart
diverge
To convert or change
transform
Puzzle fit of continents.
continental drift evidence
the layer of the Earth between the crust and the core.
mantle
the hottest layer of the Earth
core