Convection Currents Video

Why do convection currents happen?

• Heat from the Earth's Core

• Heat from the sun

• Heat from forest fires

• Heat from lightening

What happens to the rock as it is pushed sideways?

• Becomes less dense and continues to rise

• Creates bubbles

• Cools and begins to sink

• Continues to heat

What ultimately causes the continents to move?

• Gravitational pull

• Movement of liquid rock in the mantle

• Continents float on the ocean

• Ocean currents

How does carbon dioxide from dead plankton get recycled to the surface of the Earth?

• The melting of rocks releases oxygen which rises to the surface of the Earth

• The plankton exhale the carbon dioxide

• Carbon dioxide is not recycled from the mantle to the atmosphere

• The melting of the rock releases carbon dioxide which is then released during an eruption