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