Big Ideas #2, Unit 5

The earth is made of layers, including a core, inner core, mantle, and crust.

There are three types of heat transfer: convection, conduction, and radiation. Each is important to the earth. Convection happens with gases and fluids.

Properties of earth materials mean that they heat and cool at different rates, even if they receive equal amounts of radiant energy.

Convection currents move magma inside the mantle.

Radiation and convection currents move weather systems.

Uneven rates of heating and cooling create currents, or winds.

The ring of fire has many volcanoes, and a great deal of earthquake activity.

Not all plate boundaries have earthquakes and volcanoes. And, sometimes, earthquakes are caused by other factors than plates.

People live in many places around the world in spite of natural hazards, including weather, ground shakes, volcanoes, tornadoes, and floods.