is the movement of the of energy from a warmer object to a cooler one. 3 types : radiation
transfer through empty space
the transfer of energy by direct contact of particles of matter
heat passing through a fluid
is set in motion by the combination of the heating and cooling of fluid, changes in the fluid's density , and the force of gravity. This energy transfer is the force that has changed our Earth's surface over a billion of years.
was wegners hypothesis that all the continents had once been joined together in a single landmass and have since drifted a part. Wegner used three pieces of evidence to support his theory: evidence from landforms, fossils and the climate
scientists who study the forces that make shape the planet
the material that forms the earths hard surface
the study of the planet
shape the surface by building up mountains
are those that slowly wear away mountains and eventually every other feature on the surface
are seven great landmasses that are surrounded by water
a vibration that travel through Earth carrying the energy released during an earthquake
the force pushing on a surface or area
the layer of rock that forms earths outer skin
a dark dense rock with fine texture
a rock that has larger crystals than basalt and is not as dense
solid material,hot rock , and is below the crust
uppermost part of the mantle and the crust together form a rigid layer
is a soft layer, layer can flow slowly. The convection currents are in this layer and provide movement for the plates
a layer of molten metal that surrounds the inner core
solid dense ball of metal
Where is the Earth's convection current?
Where does heat comes from that drives the convection current in the asthenosphere?
Why is it sooooo important?
moves plates and changes earths surface
How does it work?
Heat from the core decrease the magma's density, making it light and rise up. When it reaches to the top, it cools down making it very dense. Because it is very dense,gravity pulls it down toward the core.