Convection and The Mantle

Question 1

What causes convection currents in Earths mantle?

Answer 1

Earths internal th all energy causing mantle to heat, expand, and rise. As it gets closer to the crust it cools becoming denser and sinking forming a current.

Question 2

Effect of Convection currents? What do they do?

Answer 2

Act as a conveyor belt moving the plates of the lithosphere above.

Question 3

What is the result of convection currents?

Answer 3

Earthquakes, volcanic ructions and building of mountains.

Question 4

Radiation

Answer 4

The transfer or energy through empty space, has no direct contact between heat source and an object.

Question 5

Conduction

Answer 5

Heat transfer by direct contact of particles of matter.

Question 6

Convection

Answer 6

Transfer of heat by the movement of a heated fluid (includes liquids and gases). Heat transfer by convection is caused by differences in temperature and density within a fluid.

Question 7

Density

Answer 7

Measure of how much mass there is in a volume of a substance.

Question 8

Convection Currents steps.

Answer 8

A) Density of mantle material is less than material above it, so the materials begin to rise.
B)Rising material hits rigid lithosphere and cannot go up any further.
C) The force of gravity is causing denser materials to fall.
D) Core heat causes temperature to rise, therefore decreasing the density of material.