Convection Inside the Earth
When an object is heated, the particles that make up that object would move ___(1)____ because the particles would have more ___(2)____.
1) faster 2) energy
Describe how diagrams model convection cells in that form.
Convection cells would move upwards and spread, then sink down, and repeat
Predict what will happen to the convection currents in the mantle if the Earth's interior eventually cooled down.
If the mantle cooled down then convection wouldn't be able to happen. Without convection plate tectonics wouldn't exist.
Describe how convection occurs in a liquid or gas.
It would get hot at the bottom and expands and rises up (is less dense) then pushed back down by gravity
Why is the asthenosphere so important to the Theory of Plate Tectonics
Without the asthenosphere there would be no plate tectonics
Asthenosphere
bottom part of the mantle, and is underneath the lithosphere
Convection currents are set in motion by the heating and cooling fluid, changes in the fluid's density, and force of gravity. Convection currents cannot continue unless there is _____________.
heat
Large amounts of heat are transferred by convection currents in the Earth's _________.
mantle
How do plates move where convection currents are rising?
move apart
Convection is a method of heat transfer by __________.
movements of fluid
Convection is caused by differences in ______________.
temperature and density
The heat needed to drive these convection currents comes from ____________.
the core and mantle
Define Plate
the separate sections that the Earth's crust is made of.
Define Theory of Plate Tectonics
the theory that the lithosphere is in constant motion
How do plates move where convection currents are sinking?
towards eachother
Define lithospere
upper mantle and crust