Earth is a dynamic globe, undergoing ongoing change as a result of both internal and external factors. Magma currents within our planet move the plates that make up the continental crust, forminsg mountains and valleys in the process. These valleys could become lakes, seas, and oceans in the future. The largest force affecting Earth on the surface is sunlight. The sun gives life its energy and controls our planet's weather and climate by creating temperature gradients in the atmosphere and oceans.
