Heat Transfer

Convection Currents in Earth

Is it possible for rock to flow? Over millions of years, the great heat and pressure in the asthenosphere cause solid rock to flow very slowly. What happens as a result of the moving asthenosphere? (Hint: Think about yesterday's tectonic layers.) The asthenosphere causes the lithosphere to slowly move and the plates slide around the surface of the Earth causing all kinds of geologic events (volcanoes, earthquakes, mountain building, etc.)

Heat Transfer 3

There are three ways heat can move (whether inside or outside of the Earth): Radiation Conduction Convection

Convection Currents in Earth

What other layer has the ability to move and flow around? The liquid outer core What is created as a result of the movement of the outer core? (Hint: It protects us.) The magnetic field

How does convection work?

As particles within a fluid are warmed, they spread out and become less dense and the particles rise. As particles cool, they clump together, become more dense and sink. The cycle continues - convection currents

Conduction

Conduction is how heat is passed through solid objects that are touching. Examples: Your hand gets warm holding a mug of hot chocolate. (your hand is touching the warm mug)

Convection

Convection is how heat moves in a fluid (this could be a liquid or a gas). Warm water is less dense and rises while cool water is more dense and sinks. The repeated movement of warm rising and cool sinking is a convection current. Examples: Boiling water (liquid)

Heat Transfer 2

Did you know? Heat always moves from a warmer substance to a cooler substance. (warm equator air moves towards the cold poles right?) So, think about it. Is the ice cooling the drinks? Or are the drinks warming the ice?!

Heat Transfer 1

Heat is always moving around the Earth. Warm air from the equator moves towards the poles, which causes the cold air from the poles moves towards the equator. This movement of air is responsible for the world's weather.

Heat Transfer in the Earth

Heat is moving through Earth too! Heat from the outer/inner core slowly makes its way through the layers of Earth. Some pretty amazing things happen as a result - earthquakes, volcanoes, geysers, hot springs, and the movement of Earth's plates

Radiation

Radiation is the movement of heat through empty space. Examples: Heat from a campfire warms you on a cool night. Heat moves from the Sun through outer space to Earth